Other than the knot on my XL Vergil from Bad Dragon I have taken a knot once irl. The feeling of a nice hot knot inside your ass is heavely! I hope it will happen again.
Nothing beats the helplessness feeling that comes over you while being knotted to a beast. Stuck there until he's done breeding you like a bitch. Hoping noone catches, but secretly wanting someone to catch you. Your stomach hurts from the amount of cum filling you. Nothing can ever come close to feeling a knot. Its addicting.