Do you want advice about whether or not you should do it or just want to kind of chat abt it to get yourself worked up for it?
How good a friend is this? Will he get pissed at you if his bf gets jealous? Will this be an ongoing thing? It sounds fun, being watched AND getting to fuck around with someone? Best of both worlds.
If he's not a good friend I'd be inclined to charge him lol (entrepreneurship baby)
This is where you pretend I have an awesomely witty signature.