I think we all have issues when developing our sexual character - its not easy and I am impressed with your sensitivity in dealing with it.

Pixies is a pretty good place to come for advice. My thought, as a guy, is that the root may be in associations. In that I associate such and such with one thing and such and such else with something else.

Your guy, may associate ejaculation only with his previous masturbation practises. Is there a bridge or common ground that you can find? For example if he masturbates whilst watching porno - could you watch it together? We guys really do need to get our rocks off - so if we're in the situation that we use to get our rocks off - it would be pretty difficult not to.

Best of luck.

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Vigil, if you were my husband, I would give you poison.

Madam, if you were my wife, I would take it.