I voted no, but some relationships are just really comfortable that way. Swingers for example, Germans, girls you met at AA, etc… all will be okay with it.
The three way is wild though, sometimes you can’t stick your weiner in the other girl, or sometimes you can. Sometimes you are just supposed to sit there with your dick in your hand while your girl and another just munch on carpet for a couple hours… while other times you are expected to have a consistent erection for 5 hours on end :shrug: