AM I A PRUDE?

I recently was watching television with my two young sons ages 6 & 11 at 5pm the other day. We were watching a Christmas Cartoon on our local Fox affiliate. During one of the breaks a promo for the show "Two and a Half Men" came on. It pictured Charlie Sheen (whoever his character is) singing a Christmas Song and replacing a word in the last stanza with a crude word about sex. My son asked me what it meant and I had no idea what to tell him. I was outraged at the show, the station and everything. Does this mean I am becoming a prude...or somehow "like my parents"? Is there anything that anyone can do to stop this kind of crap on TV?