You don't have to be a Casanova—smooth, suave and completely at ease—in order to be a good lover. But a few elbows in the head, maybe pinning her hair to the bed, and knocking foreheads or teeth can indeed put your more pleasurable antics on hold. But just like a singer on stage or an actor in a play, when you stumble and make a slip, you have to keep going without hesitation and delay. Push through little mistakes. If you don't dwell on the negative, she won't either. If you fuss about your accidental bumps, she'll definitely be put off. Keep the mood unbroken and your bruises and scrapes the proud war wounds of incredibly hot sex.
It's happened. After a meal, some drinks, carbonation... and voila! Some excess air starts building in pressure and it has two options: going up or down. Burping near her, in her mouth while kissing is something to avoid, and so is letting go of some noisome stomach pressure down below. Still, when it's an accident, all you can do is laugh about it. Women will appreciate your joking nature. Funny noises during sex are common. When you think about it, most sounds we make are grotesque, but everyone makes them, so they're forgivable. Even little miss hottie underneath you writhing away makes noises that are less-than-pleasant sometimes. So, crack a joke—and maybe a window—and go back to giving her a great time.