The trick in keeping a three way relationship
is to make sure everyone cares for each other. That means, for a couple,
keeping a three way relationship with their best friends is easier than keeping
one with a stranger or a common friend. A stranger won’t care for your relationship,
just like your common friend, while your best friend cares about your friendship
as well as your relationship. Therefore, I would recommend you to have a threesome
with your best friend rather than finding some one on tinder for threesome
dating apps.