Abstinence means different things to different people. For most people, abstinence means not having sex with anyone. Sometimes people use abstinence as birth control to prevent pregnancy. Zhang L, He Y, Feng S W, Zhang L, Zhang L, Jiao Z L, Zhan Y Q, Wang Y J. Preparation and tribological properties of novel boehmite/graphene oxide nano-hybrid. Ceram Int 42(5): 6178–6186 (2016) Most condoms come pre-lubricated, but adding extra water-based or silicone lube can make condoms feel great and help keep them from breaking. Put a few drops on the head of your penis or inside the tip of your condom before you roll it on, and/or spread lube on the outside of the condom once you’re wearing it. Gong K L, Wu X H, Zhao G Q, Wang X B. Tribological properties of polymeric aryl phosphates grafted onto multi-walled carbon nanotubes as high-performances lubricant additive. Tribol Int 116: 172–179 (2017)

It’s good to be in the know so read the info inside, especially if you are using condoms for anal or oral sex. Yu L, Zhang L, Ye F, Sun M, Cheng X L, Diao G Q. Preparation and tribological properties of surface-modified nano-Y 2O 3 as additive in liquid paraffin. Appl Surf Sci 263: 655–659 (2012) Xiang L H, Gao C P, Wang Y M, Pan Z D, Hu D W. Tribological and tribochemical properties of magnetite nanoflakes as additives in oil lubricants. Particuology 17: 136–144 (2014) Vardhaman B S A, Amarnath M, Ramkumar J, Mondal K. Enhanced tribological performances of zinc oxide/MWCNTs hybrid nanomaterials as the effective lubricant additive in engine oil. Mater Chem Phys 253: 123447 (2020) Sifuentes E T, Kharissova O V, Maldonado-Cortés D, Peña-Parás L, Michalczewski R, Kharisov B I. A comparison of tribological properties of nanolubricants containing carbon nanotori and additional additives. Mater Chem Phys 272: 124973 (2021)Tear the wrapper open from the serrated edge. Be careful with the condom, it could get damaged by fingernails or sharp objects. Huang Y, Han S, Liu S Z, Wang Y H, Li J S. Preparation and tribological properties of surface-modified calcium borate nanoparticles as additive in lubricating oil. Ind Lubr Tribol 66(1): 143–150 (2014) Wang N, Wang H G, Ren J F, Gao G, Zhao G R, Yang Y W, Wang J Q. High-efficient and environmental-friendly PTFE@SiO 2 core-shell additive with excellent AW/EP properties in PAO6. Tribol Int 158: 106930 (2021) Liu Y H, Xin L, Zhang Y J, Chen Y F, Zhang S M, Zhang P Y. The effect of Ni nanoparticles on the lubrication of a DLC-based solid-liquid synergetic system in all lubrication regimes. Tribol Lett 65(2): 31 (2017)

Tomala A, Ripoll M R, Gabler C, Remškar M, Kalin M. Interactions between MoS 2 nanotubes and conventional additives in model oils. Tribol Int 110: 140–150 (2017) Chen Z, Liu X W, Liu Y H, Gunsel S, Luo J B. Ultrathin MoS 2 nanosheets with superior extreme pressure property as boundary lubricants. Sci Rep 5: 12869 (2015) Somers A E, Khemchandani B, Howlett P C, Sun J Z, MacFarlane D R, Forsyth M. Ionic liquids as antiwear additives in base oils: Influence of structure on miscibility and antiwear performance for steel on aluminum. ACS Appl Mater Interfaces 5(22): 11544–11553 (2013)Tomala A M, Ripoll M R, Michalczewski R. Tribological synergy between classical ZDDP and innovative MoS 2 and MoO 3 nanotube additives at elevated temperatures. Proc Estonian Acad Sci 68(2): 178–184 (2019) New Relic uses this cookie to store a session identifier so that New Relic can monitor session counts for an application. During sex, Durex Performa Condoms are worn on the penis to prevent semen (sperm) entering the woman’s vagina when the man ejaculates (comes).

Kang X H, Wang B, Zhu L, Zhu H. Synthesis and tribological property study of oleic acid-modified copper sulfide nanoparticles. Wear 265(1–2): 150–154 (2008) Dai W, Kheireddin B, Gao H, Liang H. Roles of nanoparticles in oil lubrication. Tribol Int 102: 88–98 (2016) Rajendhran N, Palanisamy S, Periyasamy P, Venkatachalam R. Enhancing of the tribological characteristics of the lubricant oils using Ni-promoted MoS 2 nanosheets as nano-additives. Tribol Int 118: 314–328 (2018) Furukawa H, Cordova K E, O’Keeffe M, Yaghi O M. The chemistry and applications of metal-organic frameworks. Science 341(6149): 1230444 (2013) Lastly, it’s a good idea to use another form of birth control, like the pill, ring, shot, implant, or IUD, along with condoms. It can help prevent pregnancy in case you make a mistake or the condom breaks, giving you extra protection. If you have a condom mishap and you’re not on another birth control method, emergency contraception (the morning-after pill) can help prevent pregnancy up to 5 days after unprotected sex.

Mou Z H, Wang B G, Lu H S, Quan H P, Huang Z Y. Branched polyelectrolyte grafted carbon dots as the highperformance friction-reducing and antiwear additives of polyethylene glycol. Carbon 149: 594–603 (2019) Lee G J, Park J J, Lee M K, Rhee C K. Stable dispersion of nanodiamonds in oil and their tribological properties as lubricant additives. Appl Surf Sci 415: 24–27 (2017)

Duan L L, Li H, Zhang Y T. Synthesis of hybrid nanoflower-based carbonic anhydrase for enhanced biocatalytic activity and stability. ACS Omega 3(12): 18234–18241 (2018) Zhang L L, Tu J P, Wu H M, Yang Y Z. WS 2 nanorods prepared by self-transformation process and their tribological properties as additive in base oil. Mater Sci Eng A 454-455: 487–491 (2007) Gu W C, Chu K, Lu Z B, Zhang G G, Qi S S. Synergistic effects of 3D porous graphene and T161 as hybrid lubricant additives on 316 ASS surface. Tribol Int 161: 107072 (2021) To help you get it on right the first time, the Durex logo on the foil show you the bottom of the condom. Chou C C, Lee S H. Rheological behavior and tribological performance of a nanodiamond-dispersed lubricant. J Mater Process Technol 201(1–3): 542–547 (2008)Luo T, Chen X C, Wang P, Li C C, Cao B Q, Zeng H B. Tribology properties: Laser irradiation-induced SiC@graphene sub-microspheres: A bioinspired core-shell structure for enhanced tribology properties. Adv Mater Interfaces 5(5): 1870021 (2018) Meng Y, Su F H, Chen Y Z. A novel nanomaterial of graphene oxide dotted with Ni nanoparticles produced by supercritical CO 2-assisted deposition for reducing friction and wear. ACS Appl Mater Interfaces 7(21): 11604–11612 (2015) The aniline point indicates the lowest temperature at which the aniline and oil of the lubricant still form a mixture. Aniline serves as an additive of lubricants in the production of fuels. It is of particular importance when used in motors Oil has a particularly high creeping and wetting capacity. It flows even into the smallest gaps and dissipates heat well. However, oiling limits bearing speed and reduces cooling capacity. Lubricating oils are used at high speeds and temperatures. Gao K, Chang Q Y, Wang B, Zhou N N, Qing T. The tribological performances of modified magnesium silicate hydroxide as lubricant additive. Tribol Int 121: 64–70 (2018)