Most of you refer to your dads or FILs. I have to cope with dad jokes from my DP EVERY day. (He's 35, and I don't want to think about what he will be like at 70)
Most of the dad jokes mentioned on this thread are part of his daily repertoire.
I'll add a few more for your ...eh...amusement.
1) Someone/anyone: Be there at 6.30/7, ok?
DP: 6.37? On the dot?
He's got a few rude ones, too. But I'll spare you'all!