When I started to date the girl who is now my wife and first met her dad, man was that nerve-wracking. Her dad's 6'3, biceps as big as melons, owns a motorcycle shop, always, and I mean always has a 44 mag holstered to his side, and he has an entire garage full of guns. My first visit we spent nearly two hours in his garage, him showing me all kinds of different guns before I was even invited to step foot in the house and see his daughter. To this day I don't know anyone else who owns as many guns as that man.
My advice to any guy who is dating ... make sure the conversations are about guns, church, Jesus, and what you've reading in your Bible. I think that's all we talked about for months before he finally started acknowledging that I wasn't just there to see his collection and actually wanted to spend time with his daughter.
I think if I ever have a baby girl I'd probably be the same way. Maybe worse.