Luke, I am your father

When Vader first met Wormie at Lando's Super Carbonite Rave Party. He was shocked to see what a noob his little bastard child had turned out to be. Not only in the glorious ways of the Sith but also in other matters(Wormie had tried to make it with his sister once). So Vader had a little talk with him about the birds and the wookies, which is where the above line comes from. Wormie refused to listen so vader took a more direct approach and cut off his hand. This changed wormies night time routine considerably.