If they use their vibrator excessively, they may eventually reach a point where it is very hard to get over the top without it.

One of my buddy's have this similar issue. He masturbate so much, that, he is use to cumming by masturbation only. The muscles in his cock has been adapted by my his hands, and the only way for him to cum, is by him jacking himself off.

He also cannot cum during vaginal sex. He did some research, and followed the guidelines. If you have an SO, that would definitely help. Now, at first stage, you do not want to masturbate for at all. And, the only sex that is permitted is BBBJ, Greek, and vaginal.

Don't be discourage after several attempts if you cannot cum. keeping building this cycle until your cock muscle has adapted to vaginal. Within about a month, he can cum very easy with vaginal sex, and have a harder time cumming by masturbation.

His cock is totally different, the ways blood is flowed through, their is no more restrictions by force of his hands, and his cock is now sensitive. Oh, please don't assume that I am somehow gay, he just told me his situation, that's all.

This method should definitely work. However, if it doesn't, its no shame of asking for a HJTC from providers.

For the longest time I couldn't blow it inside the lady.  I had to pull out and release it on her.  Slowly I came around, so to speak.  It's a comfort thing.  Keep working at it.

If I wear a condom, it takes a real long time, more than the regular appointment.  Time increased along with age.  Never used them with girlfriends and such, so I just don't like em.  Only remedy is going a long time and saving up for the appointment.