If you felt pressure in or around your anus, that doesn't necessarily mean that your boyfriend's penis entered there. Either one or both of you can guide his penis with your hands to your vaginal opening and help it enter. I'd say this is somewhat about genderbut also about whose body is the receptive one; that is, who's body opening adult sex orgies pictures having someone else's body part inside of it. As I said above, the vagina does have an end to it, so you will not be injured by your boyfriend's penis going too far. At the end of this, I'll give you some reading material that will, Where to put penis in vagina think, give you more to where to put penis in vagina about and More to try in your quest for satisfying partnered sex. Sex is supposed to be fun, and while what that fun means or looks like will depend on the people involved, fun isn't going to include doing anything you don't want to do or wind up finding uncomfortable or even distasteful. So, doing any sexual activity you choose slowly and with intention can help you avoid injury, as can communicating what you're feeling, needing, and wanting to your partner. How do I keep that from happening? While it's true that physiologically vaginal intercourse on its own isn't always, for the person where to put penis in vagina has the vagina, something to write home about, there are plenty of ways to actively make the partnered sexual activity, including slowing things way down satisfying for everyone involved.