When I was growing up, Sex Educator Sue Johansen had a radio show where she dispensed her honest brand of sex advice and I giver her a lot of credit for me being a sensitive and skilled lover. I haven't needed to listen to her for a long time, but she now has a show on Oxygen and a website full of info.
Link:
http://www.talksexwithsue.com/sexindex.html
Of course, I also credit listening to all those female comics on Evening at the Improv complain about lousy lovers for helping me focus on the importance of giving.
Also, I can't imagine getting sex advice from my brother. Uh, good luck with that.