@parados,
Actually, that's an often given advice that is more recently being proven wrong. More recent findings are that the man should concentrate on the feeling in his penis, and be familiar with the stages that it goes through leading up to orgasm. Researchers have found 4 distinct stages. In knowing what stage he is at, he is then able to slow/change/manage the rhythm when he is building too far.
Breathing also plays are large part in reaching orgasm (the breathing rate increases as you near orgasm, and slowing the breathing rate slows the build up). As a supposition on my part - the oxygenation of the blood seems to play a part (which may be another reason why breathing is important), so it should be better in fitter people.
There are also exercises that 'strengthen' the penis (pretty much the same as kegal exercises for women) that affect it's stimulation (though that may be a result of the guy becoming more aware of his own penis, as above, or a combination of both)
Other than that - The man should be allowed (and encouraged) to enjoy the interaction as much as the woman - suggesting otherwise is a double standard waste of time that says that just increases pressure on men - implying that their pleasure is meaningless, that in order to satisfy her they can't enjoy the pleasure, otherwise they won't satisfy her...ie I think it's psychologically damaging.