I respect your decision, I don't think you're harming your kids in any way, but I've made a different decision about how to raise mine. Swearing, yes. A boob or two? Maybe. Overt sexuality? No.
I'm not 100% sure I found the right youtube video of the advert... (hulu is flat out countriest), but it sounds like either kids won't get the sexual references, or will just see it as funny nude people :/
It's a tough call for parents though...