Honestly?
Counseling.
I know that sounds hokey, but something is causing him confusion. Our first experience was a disaster. I went from "into it" to "how could you do this to me" in the space of one blow job...
It really freaked me out, so I decided to take my employer up on the free "six sessions" of crisis counseling. Sure - it wasn't THAT much of a crisis - but free is free
It was a very positive experience. I realized that I had a lot of underlying issues that were making me incredibly insecure. Sure, the guy didn't think swinging was a great idea, but he didn't try to talk me out of it. He figured there were much bigger fish to fry.
I dealt with some lingering issues that I just had never faced and in the end, I gained more than just the "freedom to swing" jealousy free. That was a small benefit in retrospect. The benefits for me personally were incredible - self-esteem, confidence, closure... Heck, I'm not afraid to say it... I got a lot out of those few counseling sessions.
Now, we swing and enjoy it. No problems whatsoever. But I am VERY glad we went through that first miserable time because it gave me the opportunity to deal with some things that I should have put to bed years ago - and that has improved my life immeasurably.
Spoomonkey