This weekend, my gf and I have found a partner for our first MFF threesome, and I was wondering, in this type of threesome, where should the guy finish? Is there a common etiquette or can you unload just anywhere? (We won't be using condoms if than makes a difference)
Why don't you just discuss this with your girlfriend and the other partner? That's what I would do if I ever found myself in your situation.
I wouldn't plan too much. Just go with the flow and do what seems natural but above all, just enjoy yourself you lucky so and so! (And don't forget to keep us posted as to how it went).
