"I have never heard 'rooster' used for the male sexual appendage, if that is what the OP is implying."
.,,.,..,

No, artbrooks: you miss my point entirely ~ that 'rooster' is a euphemism invented in USA because it cannot be mistaken for a synonym of 'penis', as, idiomatically, 'cock' can. Similarly, 'in back of' cannot, like 'behind', mean 'buttocks'.

Wake Up!

~M~