http://www.antimonkeybutt.com/

this stuff has been amazing for me... one of my very good friends told me it helps him from nights he is behind the drumkit for an hour and a half at a show... I started using it when I started running, and was still pretty heavy, and had that chaffing issue.... I apply it before I get dressed in the morning, and have some in my locker at work for my after shower...