I'm sure your dad's sitting there thinking you're overreacting or that it's teenage female hormones, MEANWHILE every other human on earth recognizes it as the usual "dads can be such insensitive clods" thing. Heck, I think it's a mandatory requirement of being a dad. My dad had a gift for deflating my teenaged ego - for example, once I was showing off a new outfit I had saved up for weeks to buy and thought looked great. It was pink (early 1970s okay) and he said I looked like a big bottle of pepto bismol. I didn't want to ever wear it again.
I'm sure he didn't mean it unkindly and most likely it was a lame attempt at being supportive (if you think about it in a really, really warped way, I can see it as him showing an interest, but using a poor (naw, ridiculously poor) choice of words.
Don't be too hard on him, after all, he's at a disadvantage, being male and all
