I've tried it a while ago, and the whole situation was just a bit awkward. I'd love to try it properly with guys who aren't preoccupied with not touching one another.
Guys worry too much about accidentally touching the other guy. Grow up. It's not gay. The first time my wife tried it she went nuts. I never heard her moan so load. The two guys have to work together, but the girls always loves it. They don't think they will, but they always do. Just go slow, at first, so you don't hurt her. After that she will love it. My wife said she never felt that full before, which added to the intensity. She never felt anything that good before or after.