Make sure that everyone is actually interested in it and not a “for you” kinda thing. Like make sure the females are as hot for each other as you are for them (or whatever the gender/person setup is).

Also, wait a week. Actually contemplate if this is purely for your satisfaction, or something everyone wants. If it’s a “gotta happen right now”, don’t do it in a relationship. If it’s a hook-up, use your own discretion as you probably already do with partners.

Sometimes, I have gay threesomes. It’s obviously not the same, but what’s not gender related and important to me is that nobody feels being put aside, and forced to just watch the two other ones having fun (unless it’s a kink, of course)

Bring a Nintendo switch

Don’t ask for or expect more, treat this as a one time growing experience and be grateful for that.

Try to predefine boundaries so that you know what both partners are comfortable with, what they do and don’t want from you , and what they do and don’t want from each other.

Everyone has different kinks and levels of comfort being open honest and upfront about those helps make it a good experience for everyone.

Communication is key Make sure that everyone is comfortable asking for what they want and saying what they don’t want at any point throughout the night.

I’ve never done one but would guess it would come down to one riding my cock and the other one riding my face