If you're in the early stages of dating someone, there's no real way of knowing when that big night will come. When it finally does, we doubt your bedroom will be in perfect condition. Running around hiding dirty clothes and stashing things you don't want your new partner to see will likely ensue.
The last thing you want to worry about when you're getting down is a full bladder. However, if you're a lady, just make sure you have enough left over for afterwards, because women should ALWAYS pee after they do the dirty if they wanna avoid a UTI.
If you really want special sexy times, you're gonna put on some sexy lingerie. And if you're a man, you'll wear a tailored suit because most people could care less about men wearing lingerie. You know, unless you're into that sort of thing!