The sight of my ex-girlfriend's plump, round ass is enough to stir my cock to life. She struts into the room, her curves accentuated by her tight jeans, and I can't help but reminisce about the old times. She notices my growing bulge and smirks, "You still can't resist, can you?" she teases, turning around and bending over to give me a perfect view of her assets. I grab my big, throbbing cock and stroke it, imagining it sliding into her from behind.