Is it just me?

I'm really irritated with the selection of clothes, particularly t-shirts, available to my kiddos. I don't understand the necessity of putting down the opposite gender. Like this shirt. Is it because I have boys? I also wouldn't let my boys wear shirts that disparage girls. They have sisters and even if they didn't I would never allow them to be disrespectful to girls. I don't get the humor or message in these shirts, or I guess I should say they are not funny to me, just disrespectful...