The whole two girls kissing to get guys off seems childish. Ive had the "wanna see us kiss" line on me and it just made me turn away from pure immaturity.
Right now at this exact moment I would tell the two dykes to get out of my room and go take it elsewhere. On other occassions I would be all over it, watching it, participating, etc. Its not big deal to me anymore. If they are both hot and I was interested in f u c k ing both of them then that would be cool but the whole girl on girl thing isnt needed. But having my choice between the two at any given time while they are both naked and letting me is another story.