Which is Funnier?

Dave has always had a problem with commercials on TV and not what you'd think. Basically he doesn't understand the message behind most of them.  Most of the time he doesn't understand who the intended audience for a commerical is and usually assumes (wrong) it's for him.  So he criticizes commericals for kids saying that what they're selling isn't fun.  Or that the commercial for a phone tells him everything he can do with it except make phone calls.  But tonight he cracked me up.  Up came a commercial for a bra and the voice-over said, "How do you know you're wearing the right bra?"

Dave: Cause it lifts my boobs up?

Me: Stop. 

Dave: What?

Me: It's not for you. i know you have a hard time knowing which comericals are for you but I promise you the commerical for the bra is not for you.

Pretty funny?  Or is it funny that this episode took place while watching Legally Blonde.  That Dave put on and is very engrossed in.

Sometimes I don't know what to do with him.