my ex used to love when I would cough during sex because he said it would clench really tight

Oooooo, you've been reading my wishbook I see. :thumbsup: Yep, it's pretty cool. Sneezing works too. Although it's usually a one-shot trick due to it being reflexive.
I think all women should study chi kung, the female aspect of it involves training certain muscles down there so that basically you can milk a guy without moving your hips. Some literature I have on chi kung talks about female practicioners starting off using wooden 'eggs' and drawing them up into themselves with only muscle contractions. Experienced gals work up to using eggs made out of marble or jade (being heavier makes it harder). Apparently in traditional Chinese medicine it's recommended for women for preparing for childbirth, but the side benefit is a damn happy man at home.


And no, I'm not making this up.