The vaginal opening is surrounded by, and, for some people, hidden by the inner and outer labia , while the anal opening is a sphincter, a ring of muscle, leading into the anus, which in turn leads to the rectum. As you can see, that's an awful lot of responsibility for a body part that doesn't have the capacity to think. I hope that sounds like fun, because it really can be.
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. So, without further ado:. From your question, it sounds like you want your boyfriend's penis to end up in your vagina, for vaginal intercourse.
So, if you do opt to engage in intercourse again, and you're feeling like you're splitting apart, please stop what you're doing, okay? The tissue between the vagina and anus -- internally and externally -- isn't very thick at all, and they're almost stacked on top of one another inside your body, so pressure or sensation in one opening can often be felt in the other.
There are other reasons besides having genitals not fit together in a way that is comfy for your body for intercourse to be uncomfortable, painful, or not pleasurable. Actually, I'd say this sort of figuring things out happens with most sexual activities, and with most partners, regardless of how long they've been together or how much experience they have with a given sexual activity.. Actively participate in what you want and actively speak up for what you don't want.
I know it may seem as if his penis is much bigger than your vagina, but the vagina is really quite elastic. I hope that sounds like fun, because it really can be.