As a follower, you should be aware of what is and what is not appropriate, just as if you should know how far someone "can go" with you out on a date.
Obviously, if you look at the leader, and he looks "happy to see you," or has a roll of quarters in his pocket, or has drool all over the front of his shirt, then you should know that his "accidental" feel was not that. Your recourse should be to punch his damn lights out.
Many times with my Pro, I did un-intentionally grab a boob or two, or might have slid a hand around her derriere, but believe me, my intent was on competing/dancing, and the farthest thing from my mind was "SEX."
Now, on the other hand, if you are out on the town at a dance bar, etc., and you are out for a one-night stand . . . who cares what either one of you are doing . . .