i don't think his masturbation has anything to do with it, it's just some guys can't ejaculate from oral sex, i'm not sure what the reason is but some guys just don't

mix the bj with a hj..then when he is close go back to the bj...does it for my bf

The switching does help alot. I have only 'completed' one time from oral only and it took like 30 mins. Mix in the hand and it could be as short as 10. Everyones different, but oral doesn't get me there. I love it but I need ALOT of stimulation.

Yeah, using both methods works better than just one.

There is a lot of good information about this under the search term "Male Orgasmic Disorder".

I'm a man that can't cum with oral sex.

I think masturbation might have something to do with it. I masturbated nearly every day since passing puberty, and in fact got to the point where I had to pull out and bring myself to an orgasm manually most of the time.

So, contrary to most of the pundits on this site, my experience is that masturbation is harmful! Harmful to achieving orgasm in other ways.

I've stopped masturbating for over a year now, and it is becoming easier to achieve orgasm during sex.

During oral sex, however, I still shut down as I start to get excited.

In reading about Male Orgasmic Disorder, psychologically issues may play a significant role. For me, that might mean that having been molested by my female, adult babysitter who before giving me a BJ said, Don't pee".

I was about 6 year's old and what I think happened is that my mind interpreted "Don't pee" as "Don't ejaculate" as I passed puberty.

Bottom line:
masturbating has it harmful side; and
adult females who molest prepubescent boys do real harm to them.