Granny a male duck actually has a penis. Female ducks are anatomically built to accept a penis. Roosters do not have a penis, the contact between a hen and a rooster causes him to literally 'shoot' the semen into the hen.
When drakes force a hen to mate, his penis can cause damage when he inserts it into her cloaca. She just is not built to accommodate a penis.
When drakes force a hen to mate, his penis can cause damage when he inserts it into her cloaca. She just is not built to accommodate a penis.