A nurse walks into a bank, totally exhausted after an 18-hour shift.
Preparing to write a check, she pulls a rectal thermometer out of her purse
and tries to write with it.

When she realizes her mistake, she looks at the flabbergasted teller and
without missing a beat, she says:

Well, that's great....that's just great....some asshole's got my pen!'

Thanks to emailer J.F.