For every kink in the world, there is people out there who is into it.
Now I can say that as a Man, I would love to try a woman taking me with a strap on, it's just something that I have always wondered and fantasysed about.
As for the orgasim denal and chastity devices, well I've never yearned to try them, but if my partner asked me politely to try them, I would. I'm willing to do anything at least twice, in case I frack it up the first time.
Just break your guy into everything slowly, (don't use a 12 inch strap on the first time), and be just as willing to fulfilling his fantasies as well. (maybe even combining them at the same time, eg, for me, I'll wear the chastity belt if you smoke this cigar)
Good Luck, and have fun!