"Sexual desire is the most absorbing of all desires. This desire is never satisfied, and the more it is indulged, the more it grows." Tolstoy from Anna Karenina.
It's human thing to have desires for sex just like animals, but only humans have the ability to resist their desires.
From your post, I can understand that you want to have sex with your friends, but something is stoping you to go ahead, that something is your conscience. So, in your heart you know it's wrong but your desire is tempting you.
It seems to me like you want to justify your future actions by gaining support from others so that you can argue with your conscience and try to convince yourself that there's nothing wrong in it.
You already know the answer to your question.
try to control your desires and then think again.
Your desire to seek pleasure compells you to stop listening to your conscience.