Even though I scored low on my slut test, *shrugs*, I have participated in 3-somes and moresomes. It gives the ladies a chance to do exactly what you are thinking Lauren. Yes it involves men who realize they are there for the ladies enjoyment. Yes they understand incidental contact happens. Yes they have to be comfortable with other men around and put their egos away.
Soon after that you will go for DP and sucking another guy. That's being serviced.
Of course on the other hand I have wanted to do the same thing but from a mans point of view. Want DATY and fuck at the same time. Maybe someday. Oh and for the Greek lovers, double penis would be handy.