Lol- this is a very funny thread!!
Men are so hopeless when it comes to their pen**- everything they say they want just goes RIGHT out the window!!! If it were me, and I was wanting to be UTD- I would just be saying 'stuff it'- if he can't take responsibility to avoid getting you UTD in the bedroom- then somewhere in his mind he has to be aware that you getting UTD is a possibility- IYKWIM? So in a way, he IS giving you the green light, by not really following through with what he claims he wants.
I would just forget about it, have fun and see what happens. He knows you are off the pill- and that it was messing with your health, so he is fully aware the responsibility befalls on him to put a condom on. If he doesn't- well, he has to be prepared for the possibility of a BFP!!! he he..... I mean, I think, if he really wanted to avoid a BFP THAT badly- he wouldn't take those risks- IYKWIM???