This is 100% normal!! The first time my husband and I set out to swing we met a very hot couple. My husband is very over sexed (well, we both are) and he was really excited to have an opportunity to be with this woman. We met them at a club and went back to their hotel room. As soon as we got through the door, the other husband started taking my clothes off and we got right down to it. My husband could not get an erection. Just like you, no matter what he did, it was not happening. We left and he was mortified. He spoke to some men in the lifestyle and they told him when you are in a situation with another couple, be the first one to get down to business. Do not watch your wife or it will distract you. Concentrate on the woman you are going to play with, and drink very little alcohol. This couple gave us a rain check and he followed their advice. He had no problem the next time, or there after. Good luck!