Mark Ruffalo and Samuel L. Jackson are just two Hollywood men going topless this month!  These sexy men are helping draw attention to the #InTheNipOfTime Campaign.

October is breast cancer awareness month and the guys at One For The Boys feel there is not enough awareness about male breast cancer (which there isn't). So they teamed up with some Hollywood hotties asking them to “check your chests, show us your selfies and spread the word.” So ladies when you do your self exam each month, don't forget to check your man and boys, vice versa!

See Mark Ruffalo's nip pic