He's a cold fish...

That's the problem with humour, it needs the references. You think you are funny, the mistake is one of assumption. Dunning-Kruger would be interested in that conceit.

There is a sweet spot, too much knowledge on the subject and it becomes unfunny again.
When the world woke up to silicon chips there were numerous jokes about silicone, particularly involving breasts. If you can design with silicon chips it just isn't funny. It is a pun without usable connection.