A man meets a woman at a bar and they go to her place.
They're undressing and he drops his trousers.
She points to his messed up knees and asks what happened.
He says 'When I was young I contracted kneesles'.
She says 'You mean measles'.
He says 'No, I actually got kneesles'.
She shrugs and continues undressing.
When he removes his socks she looks at his sorry toes
and asks about them.
He says 'Shortly after the kneesles, I contracted toelio'.
She says 'You mean polio?'
He says 'No, I got toelio'.
She shrugs it off, until he drops his shorts.
She looks at his tiny prick and says 'Don't tell me -
you contracted smallcox'.