The best example is a practical one. The next time you urinate, pay
close attention to the muscles you use to push out the last of urine.
You "pull up" with those muscles.
that movement of pulling up is the reverse thrust.
Try to pull up on those muscles and "hold it held up"
for as long as you can while masturbation or sex. When a
female uses her reverse thrust muscles, it facilitates squirting.