Heck you're alone in the locker room with him, he's wearing knee pads... Just think of the possibilities with more than just his butt...
http://67.media.tumblr.com/97347e956900bdd0a70e1c6427d9712f/tumblr_o4y4f98EME1v2k0uto1_500.jpg
More my kind of guy oral hygiene butt...
http://4.bp.blogspot.com/-ix0UZXQKrKE/UVfGy9e70LI/AAAAAAAAWMA/zdw0SZoK6Qs/s1600/31211184164.tumblr_brushing+teeth.jpg
More my kind of guy good oral hygiene pecs...
(With the tool in their mouth no less.)
http://guyswithiphones.com/2013/06/07/DWAYNE.jpg
http://4.bp.blogspot.com/-DOsJYxjFkKY/UT58u8QANcI/AAAAAAABSHs/m52s5qZotGA/s1600/SB298.jpg