Joking? If he's been a good example in the past, then one thing shouldn't change your mind.

I got so much swag yolo ;)

You refuted his one example, but his point still stands. Fine, what if you found out that he's a current member of the KKK? (As far as it being a turn off, though; I don't think you should be turned on by your father in law in the first place...)

I wouldn't take that comment personally, he probably just said that because he didn't want to get emotional and feel awkward or he was probably just joking.

That's in-laws for ya!

False, his father in law eats only nails for breakfast and instead of milk he uses the tears from his in-laws!

Or the father knows himself, and OP was just sucking up to him

Just stop. That "_____ of the year goes to..." is so old.

how?

the expression. To OP, he was one thing, but later showed his other side.