You slip in the open door, your visibility reduced to near nothing in the thick steam. You shed your clothes, giggling silently as I rumble out some eighties tune, singing to the showerhead. You watch through the translucent shower curtain as I look towards the water, idly stroking my cock, and feel yourself growing excited watching me without my notice. You reach down to tease yourself, wishing you could watch me candidly jerk off without me knowing.
I lean forward, one hand bracing myself against the wall, still slowly stroking, and you take the chance to slip in behind me. You listen to my breathing get heavier, the strokes getting shorter and faster, and you keep stroking yourself, teasing your clit and pinching your nipples, trying to stifle your gasps as you get more excited. I'm too deep into it to hear, though, and gradually my stance widens, my feet bracing against the sides of the tub. Unable to help yourself, so turned on from watching me in this private intimacy, you reach forward to cup my balls, hanging full and swaying as I stroke.
I give out a most unmanly yelp at the unexpected touch, jumping up and stumbling, falling to a seat on the toilet with the tattered remains of the shower curtain wrapped around me. I look at you in utter shock, and you try to stifle a laugh as I try to compose myself. It doesn't happen... trying to stifle a laugh makes this even funnier, which means you're now trying to stuff down an even greater laugh, until you're finally bent double, holding onto the soap dish for support. I try to stand, legs tangled in the curtain, and that just makes it funnier as I slip and slide my way to vertical. With a certain air of injured pride, I right the shower curtain rod, then try to fix the horribly damaged curtain; fully half of it won't stay up.
There's a touch of acid in my voice as I say "Are you *quite* finished?"
Still giggling, you give me mock sympathy. "Ooooh, poor baby. Did someone get a bad touch?"