What do you say to your sister when she's crying?

"Are you having a crisis?"

I walked down a street where the houses were numbered 64K, 128K, 256K, 512K and 1MB.

That was a trip down memory lane.

I went on a date with a girl who said she loved animals.

I said, "I work with animals every day."

She said, "That's so sweet. What do you do?"

I replied, "I'm a butcher!"

We never went on a second date.

What did the scientist say when he found two helium atoms?

"He-He!"