Sounds awesome. Lots of bumping and grinding baby!
As long as it's boy-girl-boy-girl (or better yet girl-girl-Narz-girl-girl) I don't see what's wrong with it.
Sexually frustrating? Sure. But then you go home and either masturbate or have wild sex with your significant other.
Besides, most modern humans are horribly, horribly touch deprived. A little loving physical contact goes a long way.
I'd go.