First of all, make sure that you don’t just have to pee! Make a trip to the bathroom before you start getting frisky, and see if that helps your problem. Or if you have more impromptu sex, even if it disrupts the vibe, if you feel like you’re going to pee — go pee and then come back to your partner to continue. Better safe than sorry, because obviously peeing on them is probably going to ruin the vibe — unless you’re both into that. Communication is key. (;
On the other hand, it could be something else. There is always the possibility that the angle that you’re having sex from is allowing your partner to press against your G-spot. In this case, after a bit of stimulation, that particular feeling of ‘Oh god, I have to pee!’ will generally pass and lead to an incredible orgasm if you’re lucky. Generally, this happens more easily if you’re riding him, or you’re having sex from behind. Try a few positions, and try to work through the feeling and enjoy the experience with your partner who may have hit the jackpot by finding your G-spot. It takes a lot of couples a long time to figure that out, so, enjoy it instead of feeling uncomfortable.
-teagan.