Welcome to SportsNation! On Friday, ESPN The Magazine senior writer and ESPN.com Playbook contributor Dave Fleming stops by to chat about his Call of Booty" story, the final part of his ... ummmm ... shall we say, "Undercarriage Trilogy."

In each of the last three years, in the 2010, 2011 and 2012 ESPN The Magazine's "Body Issue," Fleming took it upon himself to talk about several taboo subjects in sports to form his trilogy. First it was the "Tao of Poo," then came "Ballbusters," before this year's "Call of Booty."

Send your questions now and join Fleming Friday at 3 p.m. ET!

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