Guys and girls i need advice?

ok well i av a load of guy friends nd im like one of d only girls in our group. I love all of them to pieces and i'm comfortable doing anything and everything. One of my closest guy friend is confused at whether he is gay, bi or straight sooo i was thinking of helping him out. We often get drunk and mess around soo i was thinking to help him figure out his sexuality I would give him a *******. This doesn't mean that i want to go out with him or anything because i've a crush on my other friend and my other friend and i will probably get together at our next party. I'm a girl by the way!! Soo my question is do ye think i should do something like this to help him out or am i bein a slut or will this backfire?? Any advice would help thanks!! xxxxxxxxxx