Dito what the others said.
When we first started we found it so hard to find couples where all four were compatible that both of us occasionally "took one for the team". Then one night on the way home from the club I said to Mrs. GT "you know, I would rather hook up less often and not take one for the team anymore" she said "thats funny, I was just thinging the same thing". It turns out we didn't communicate that well that evening as we both assumed the other was really into their partner, but in actuality neither one of us was, so we both took one for the team with the same couple. We don't do that any more.