Penetration, hand jobs, masturbation, fingering—if you’re having any kind of sex, you can (and should) use lubricant during it to reduce friction and make things more comfortable, Allison K. Rodgers, MD, a board-certified reproductive endocrinologist and infertility doctor at Fertility Centers of Illinois, tells SELF. But if you haven’t found your go-to yet, searching for the best lube can be daunting: It’s easy to feel like there are as many different kinds as there are ways to use it. So how do you choose the right one?

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