The bulbus glandis (also called a bulb) is an erectile tissue structure on the penis of canid mammals. During mating, immediately before ejaculation the tissues swell up to lock (tie) the male's penis inside the just inside the female's vagina; this is called "the knot" tightening thus preventing the male from withdrawing.
Male canids have a bulbus glandis at the base of their penises. The penis sometimes emerges from the penile sheath during sexual arousal. During coitus the bulbus glandis swells up and results in a 'tie' (the male and This is known as "tying" or "knotting". While characteristic of mating in most canids, the copulatory tie.
As I'm singing this new version over and over in my head, I start thinking "well yes my penis hangs low, yes it wobbles to and fro, but CAN I tie it in a knot?.