...were having lunch one day when each announced they were pregnant.
'I'm having a boy' said the brunette, 'how do you know' asked the blonde. 'Because I was on top' answered the brunette.'
'I'm having a girl' said the redhead, 'how do you know' asked the blonde. 'Because I was underneath' answered the redhead.
With that the blonde burst into tears and the brunette and redhead asked what was a metter. 'I'm having puppies' said the blonde.