There was an episode of Sex in the City where the slutty one was saying that she was doing excercises to tighten her pussy while at that very moment she was having lunch with her friends. I guess you could do the same, excercise those sphincter muscles. Cool set of excercises at
www.bowelcontrol.org.uk/pdf/sphincterex.pdf It's useful for sphincters that are weakened through, among other things, "general wear and tear," sounds like gangbanging to me.
Seriously they do look like good excercises and I hope they help. Good luck and remember: loose lips something something
cosmaz