Ray

Oh dear, I made a backwards ray. Let's test it. I made a backwards ray, let's test it oh.

Site

What did the substrate say to the active site?

"C'mon baby, we fit together, open my door lock to f**kin' key."

Crab

Why would you never donate to crabs?

Because they're shellfish!

Fence

Why did the first fence hate the other fence?

The second fence used some of-fensive language.

Napkin

My friend tried to sleep on napkins.

I guess that's why they're called NAP-kins.