Not quite sure I know what you are asking for - as in the topping so its not so childish? or Adult Themed like boobies ??

I guess the easiest would be to turn the cup cakes into butterfly cakes. Cut a small circle out of the top of the cup cake, fill the hole with cream, ganache etc then take the cut out section and cut that in half and replace like butterfly wings then lightly dust icing sugar over the top.

is that like what you were talking about?

Nae x