Why do Rafa Nadal and other champions bite trophies after they win?

Question

Just wondering

Answer 1

There are two reasons I can think of:

1) To make sure it's real gold.  Fake gold will not dent, but real gold will have teeth impressions, so he's proving that it's real gold.

2) To put his teeth marks in the trophy, marking it as partly his forever.

Answer 2

I guess it's just one of his "trademarks".

If you watch him in interviews, he's always fidgeting, biting his nails, etc.

This actually explains it better:

http://sportstsar.com/2008/07/06/rafael-...

Answer 3

to strengthen their teeth