Here are a few dad jokes to brighten your day:

What do you call a factory that makes okay products? A satisfactory.

Did you hear about the mathematician who's afraid of negative numbers? He'll stop at nothing to avoid them.

Why don't skeletons fight each other? Because they don't have the guts.

Parallel lines have so much in common. It's a shame they'll never meet.

Why don't scientists trust atoms? Because they make up everything!