Well, one option is to avoid situations where his mind moves to sexual stimulants if he wishes to have a mind over body balance.

Refrain from intimate acts, and situations. No dirty movies or porn. And always keep an active concentration on not getting aroused, it -is- possible.

Though masturbation is perfectly fine, it is not always satisfying. If he can maintain a close and loving relationship, to fill his needs to companionship, and perhaps an outlet for extra energy, sexual urges can be negated.