My friend's husband decided to go online to find a sexual position they had never tried in an effort for a little added fun for the night. She and I were IMing at the time and she figured he was going to get himself all worked up then he'd pull her to their room where they'd have sex in a position they were very familiar with.... She was perfectly happy with whatever position(s) they ended up in.
Lo and behold he found one......
It's called The Pair of Tongs.
My first reaction was, and I quote, "Why? Seriously, why?" But then... I thought about it. Have sex and tone your arms at the same time. You'd have to flip over to the other arm half way through, but clearly it can be done. Since you're already in that position you could (and seriously I mean you, cuz there's no way in hell I could manage this) also do some one armed, sideways push ups. Seriously, think of the marketing. I bet Joey could come up with a hell of a campaign around this new exercise regiment. Feel the burn then feel the spasms. See, I'm no good at this. I'll do the books for the millions we'll rake in, but someone else is going to have to come up with the right angle. (all puns intended)