No, it is not possible to contract the typical STDs, such as syphilis, gonorrhea, chlamydia, hepatitis B, etc. from wearing someone else's dirty underwear. However crabs and scabies, may be spread in this fashion.
Tick-tock-tick-tock-tick-tock. The Crocodile or Tick-Tock the Crocodile is a crocodile that stalks Captain Hook. At some point Peter Pan had a fight with Captain Hook in which he cut Hook's left hand off and fed it to the crocodile.
Jason Marsden did the voice for the TV series Peter Pan and the Pirates in 1990. Robin Williams played grown-up Peter in 1991's Hook. And of course Jeremy Sumpter played Peter in the 2003 live-action movie.