Wouldn't it be great is sex was the ultimate workout, and doing it once a day could constitute your workout? Yeah, dream on. Unless you're a porn star, sex probably isn't going to get you in shape, but that doesn't mean it doesn't burn a bunch of calories. Want to know just how many?

eDiets has the answers you've been looking for. A 30-minute session burns between and 100 calories. So it shouldn't be the only exercise in your life, but you'll be pleased to know that those who are healthy and exercise on a regular basis enjoy better sex lives -- not only do they have extra energy to get it on, but they're more aroused than couch potatoes.

So, to sum up: Sex is good for exercise, but exercise is even better for sex!