Why didn't the biochemist laugh at antibody jokes?

He was humorally immune.

Drunk guy sat at a bar

Drunk guy sat at a bar, is on his 15+ beer of the evening when he notices 3 newcomers enter the pub and sit at the bar next to him.

"Hey, wanna hear a dumb blonde joke?" he asks the nearest one.

The newcomer turns to face him and for the first time he see it's a lady with blonde hair.<...

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