Depressed snake

Bert the snake goes to see his doctor. "I need something for my eyes. I can't see very well these days," he says. The doctor gives him a pair of glasses and tells him to come back in a fortnight.
Bert returns two weeks later that tells the doc he's very depressed.

"What's the problem?" asked the doctor."Didn't the glasses help you?"

"The glasses are fine," says Bert. "But I just discovered I've been living with a garden hose for last three years."