How to Have a Successful Threesome

I have had several threesomes none with a very significant partner but even though you tried it you know give all you can give to both you still kind of get a little bit jealous if it's the same sex as you now I've also had a threesome with two brothers actually and it was a funny thing because one brother was telling the other brother how to do it right but the younger brother was doing it better than the older brother