If Jehovah's witnesses are worried about the guys falling into sexual sin with their girlfriends, don't you think the Watchtower had better stop discouraging masturbation? Going on a date "loaded" is not a good idea if you want to remain chaste. JW guys need to "shoot off a few rounds" beforehand if they want to keep from having urges to fornicate. Not only that but they'll then be able to have some real conversation with the girl instead of bumbling on because they're thinking about sex the whole time.
There's nothing like masturbation to deaden the sexual urge.
Well, castration perhaps but I'm not advocating that.