Kegels (the PC muscle exercise) will not stop erections though, they will only cause you to get MORE erections, that will last for a longer time. If the guy starts doing Kegels when he's dancing it will only make his pants shoot out more.
Not even porn stars can keep their penises from becoming erect.
And flexing your PC muscle to interupt ejaculation is widely publicized, but nearly impossible in practice, the timing is key, too early and you will actually cause yourself to ejeculate, because the tensing of PC muscles can also induce ejaculation. Hence the "pumping" or "throbbing" action flexing your PC muscles induce. Doing it too late has no effect. Even if you have "practiced" and "exercised" very very very very few men have the ability to completely control ejaculation. This is the major reason why you see the same guys in all the porno movies.
What PC exercises will do is promote general prostate health, help you have more body shaking orgasms, harder erections, and recover from orgasm faster. As for interupting ejaculation midstream that is neither healthy nor worth it, as male orgasms without ejaculation are not as satisfy as with them.
