Girlfriend's Father

[freshnesschronic]

Can someone explain to me the whole phenomenom of girlfriend's fathers hating their boyfriend?

I've tried so hard to show that I'm a nice dude but it is futile right now.

I'm not a father, so I don't know. But why do I have this feeling that I will never like him, or my father-in-law (which he probably will become {ooh puppy dog love, cute I know right}).

I do my best to treat her right, I've bought her tons of stuff, yeah I'm trying to make myself look like the perfect boyfriend (which I'm not) but I don't think I'm that bad.

Father's inquiries requested.