Ah back to sex again. You and Charm have more in common than the name! We are back to the car starter handle analogy in Charm's
HPV and sex thread, which I really enjoyed! It is of course also good exercise in its own right.
Thanks for all the info above, fascinating but I'll need to read through it again to get my head round it all. I'll get back to you in a PM, but need to go and make some supper now.