What's a 'dry sense of humour' ?

[Regumika]

I thought dry humor describes the presentation of the humor rather than the actual content of the humor?

my boss always cracks with laughter after he tells a joke or funny story. I never do that.

This has made me remember the times that I think about Comedians. I have always thought that a good comedian don't laugh at their own jokes - in this case, dry (good). Laughing at your own joke is like.. queuing/spoiling the punchline. Especially when the joke itself is bad, then you're left with the joker laughing alone - awkward.

Now, if you (the joker) genuinely think the joke is funny, then of course you're going to laugh as you're telling it - this is okay. It's the forced timed laughs that gets me a little irritated.