After doing Duke of Edinburgh award and going camping when i was 16 i had 2 or 3 on my arm, they are sooooo disgusting, at the time didnt know about the o tom etc so had a bath in the attempt that it loosened off and then my mum ( much braver than i was) got them between her fingers and twisted it out a bit like the o tom did, i was squealing like such a girl at the time.
will make sure i look out for any on marty though
x