Guys can also flex and release during sex to delay orgasm so they can go indefinitely. It's easiest to do it in a position where you're doing all the moving, just do flex it with the rhythm, AFAIK. BTW, don't do this unless you've exercised it for a while, you could pull it.
Quote:
Originally posted by isandro
Doh, I always thought you needed to have a hard-on for these, but it's not in the text anywhere...
Now it's much easier to do these in public 
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Heh heh... How were you doing them in public before
?