Stay with her a bit

You have the blonde think she already washed the "shampoo" out of her hair, so she turned off the shower with your cum still all in her hair. You had her not dry her hair with a towel, and just dry her body. She then went over and blow-dried her hair, making it stiff with dried cum but she seemed to think it was fine having stiff hair sticking out in different directions. When she finished, she thought her hair looked like it normally did. She then got dressed, but as she did, you made sure she could not get the thought of being covered in cum and piss out of her mind and would not be able to until she acted on it.

You watch her dress and leave, getting weird and amused looks by the other women.

You decide to leave the locker room, but not before giving each woman there in a state of undress the inability to remember how to put the clothes she brought with her on. You watch for a moment while the women quizzically look at buttons, zippers, and snaps and not being able to remember how to to fasten them. The women knew they should know how to get dressed, but they did not want to admit and ask for help. They just embarrassed and confused as they held their clothes up or closed with their hands.

You leave the locker room.