"Voted the sickest joke of the year" joke

There was a little girl and her mother walking through the park one day
>>and they saw two teenagers having sex on a bench. The little girl says
>>"Mummy what are they doing?". The mother hesitates then quickly replies "Ummm
>they are making cakes".
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>> The next day they are at a zoo and the little girl sees two monkies
>>having sex. Again she asks her mother what they are doing and her
>mother replies with the same response, making cakes. The next day the girl
>says to her mother "Mummy, you and Daddy were making cakes in the lounge last
>night eh?". Shocked, the Mother says "how do you know?"
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>>Yucky, scroll down.............
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>>Here goes..................
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>>Are you prepared for this????????
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>>It's REALLY NASTY.........
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>>She says, "Because I licked the icing off the sofa".