If you compulsively pun you are called a paronomasiac.

For one thing, I don't pun excessively in real life.

I've just been on a once-in-a-lifetime holiday. I'll tell you what, never again.

Now you know those trick candles that you blow out and a couple of seconds.

So I said to the gym instructor: 'Can you teach me to do the splits?' He said: 'How flexible are you?' I said: I can't make Tuesdays.'

So I got home, and the phone was ringing. I picked it up, and said 'Who's speaking please?' And a voice said 'You are.'