fun in the changing room

You follow a couple of young ladies back to the locker area. They chat as they towel themselves off. One puts on her panties and sits down to dry her hair. Her friend bends over a gym bag. You pinch the one bending over on the ass.
"Hey, you!" she says as she turns to her friend. "Watch it!" she says playfully.
The other girl just looks confused and returns to drying her hair. Her friend bends over again. This time you quickly jam your finger up her ass. "Whooo!" she says and bolts upright. She turns to her friend. "What's wrong with you?" she asks.
"What are you talking about?" says the other.
"Oh, you think there's nothing wrong with goosing me like that?"
"What on earth are you talking about?" says her friend.
"Look, just keep your hands to yourself, OK. If you're that frisky, go home and call Dave for a booty call."
The girl drying her hair has no idea what's going on. You move behind her. You have a raging hard on. You start to stroke your cock. In a matter of moments, you shoot wad into her thick, damp hair. Luckily she does not notice. She now has thick gooey strings of cum in the back of her hair. She goes over to a counter top with a mirror and starts blow drying her hair. She dries your cum into it.
Her friend, who is now dressed, comes over to dry her hair. As she passes by the first woman, you pinch the first woman's ass.