Two blonde girls were working for the county public works department.
One would dig a hole and the other would follow behind her and fill the hole in.
They worked up one side of the street, then down the other, then moved on to the next street, working furiously all day without rest, one girl digging a hole, the other girl filling it in again.
An onlooker was amazed at their hard work, but couldn't understand what they were doing.
So he asked the hole digger, "I'm impressed by the effort you two are putting in to your work, but I don't get it... why do you dig a hole, only to have your partner follow behind and fill it up again?"
The hole digger wiped her brow and sighed, "Well, I suppose it probably looks odd because we're normally a three-person team. But today the girl who plants the trees called in sick."
Grandma's Don't Know Everything
Little Tony was staying with his grandmother for a few days. He'd been playing outside with the other kids for a while when he came into the house and asked her, "Grandma, what's that called when two people sleep in the same room and one is on top of the other?"
She was a little taken aback, but she decided to just tell him the truth. "It's called sexual intercourse, darling."
Little Tony just said, "Oh, OK," and went back outside to play with the other kids.
A few minutes later he came back in and said angrily, "Grandma, it isn't called sexual intercourse. It's called Bunk Beds... and Jimmy's Mom wants to talk to you."