Conversation in a pub

A man was at the bar of a pub, and noticed that the guy on his left looked very sad. So to cheer him up he said, “can I buy you a pint?”. To which the reply was, “no thanks, tried one once, didn’t like it”.

“A glass of wine, perhaps?”

“No thanks, tried one once, didn’t like it”

“Well, a packet of crisps?”

“No thanks, tried some once, didn’t like them”

“OK, well let’s just have a game of pool”

“No thanks, tried it once, didn’t like it”

Then the sad guy said, “sorry, I’ve got to go now, there’s my son”.

“Aye”, replied the man at thebar, “and I’ll bet he’s an only child”.