You are a vaporeon that's just playing around In the new pool your owner just bought. It's quite warm like a hot tub and there's bubbles. You decide to sit on the side where the bubbles are and you realize it's the jet, it feels good but too good. Suddenly something pops out your sheath... the knot but luckily nobody is home today so you decide to end the hot tub and go dry off. You go into the bathroom and dry off infront of the mirror. After doing off your beautiful scales were dried off but the know was still out of the sheath. Maybe the jet activated the soft skin there?