The feeling of a threesome
These encounters can be a lot of no fun. Surprising when you consider that it’s so often a fantasy. I think the primary issue is the more people included in an activity the less likely everyone is to be on the same page. Level of agreement is inversely proportionate to the number of people involved. Then add the fact that the more intimate an association the more agreement is necessary to make sure everyone is comfortable and you’re kind of asking for trouble by forming a group of three rather than a stand.
The Limits of anatomy
Maybe we can look to our structure for guidance. We can only face one person at a time. That’s a potential hindrance. Do I know that you don’t always have to be face to face during sex? I’ve heard something like that. If you’re not comfortable in the situation and everyone in it you may not want to take your eyes of another person. Now more than ever you don’t want someone busy behind your back.