Is there a way to make my boyfriend more sensitive

[Virge]

That's the big one, I think. Excluding much rarer mental or physical conditions causing an inability to ejaculate (which would likely affect masturbation as well) the problem is that the force guys use when masturbating is often far greater than the friction that will be involved in sex or oral.

and once you get him past that he'll be a sex fiend........... hahahahahahhahaha!