I am surprised at least one didn't suck the other one off. I've never done any understall sex. I would rather be able to make out, play with nipples, fondle and suck and be sucked. As much as I love pussy, I also love cock and hot man sex.
I was lucky one time at UIUC to be able to back up from the urinal, through the open stall door directly opposite, drop my pants, band over, and have a dude snake my ass with his tongue until I turned around and shot cum on him. Jerking and blowing in a tearoom is awesome, but some ass play takes it to another level.