Well, one thing I'd suggest is that
a) he could imagine she's one of the 'bitches'
b) he loves her? he cares about her? then he'll just do it for her.. she obviously wants it
c) not sure what his problem is with doing it, if he thinks it's just not something you do with someone you love? well, that's bogus, sex and sexual play is all about what the parties involved want
d).. does he want to KEEP getting some? then he'd better do what she wants..
e) isn't that what most guys want? to come in a willing woman's mouth?
Cum is protein and is healthy and good for you.. so he's actually doing her a favour and providing her with some essential nutrients.. (if he can't for any other reason, perhaps he can when he knows it's helping her with her health)..
......
I'm still in shock that a guy doesn't want to cum in a woman's mouth, especially 'HIS' woman...
or he could get loaded and that might help him along (as long as he doesn't get TOO loaded so he can't get it up)..
tell him to eat lots of fish, that will help him get some good tasting cum happening..