It's hard for me to take some things seriously. Back when I started dating one of my ex girlfriends, we had just had sex and were working back up to round 2 when she says "You're a good kisser" to which I replied "That's what my mom says too!"
I still don't know why I said except to just be a smartass or maybe it's that I don't take compliments very well. Needless to say it surprised the heck out of her.