The gay guy only wants one ass in that threesome and that ass isn't down to party. Why does the chick want to watch two guys play cat and mouse? Nvm I see why. The inevitable butt rape would be hot as fuck.

You cant ignore the gay guy that would be rude and the only reason the gay guy is there is for the girl's entrainment. So unless you  want to give up your ass for a hot girl or make the cho cho dick train then my honest opinion is its up to you.