Does that make you horny? 

No but seriously, why do they do that? 

Some of the best fighters of all-time such as current pound-for-pound number one Jon Jones, UFC Hall of Fame nominee Rashad Evans and St-Pierre have trained at the JacksonWink MMA gym in Albuquerque.

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The longtime welterweight champion St-Pierre recently spoke to ESPN about the reason fighters at the gym pinched their nipples in the cage.

Flip the Page to hear him explain: