Reader Chris Brown sent in this gag which came via his daughter from her science teacher, Mr Brent Butler.
An atom goes into a bar and orders a drink.
After finishing his drink, he reaches into his pocket to pay the bartender,
and says, Oh no, I’ve lost an electron!”
“Are you sure?” says the bartender.
“Yeah,” says the atom, “I’m positive!”
And this is a bonus one, from Chris himself:
Q. You know who’s been together forever, been through a lot of crap, and
are still together to this day?
A. My arsecheeks.