She'll be washing away all the good self cleaning bacteria from her vagina doing that, not to mention the relatively unsanitary aspect of a fountain head within reach of other's hands.
Part of me wishes she had done hardcore, but then that would have detracted from her innocence appeal. I like how she looks like she came right out of a prep school yet she's so horny and slutty she masturbates in public and even inserts the fountain nozzle in her tight little pussy like a cock. My dick gushed out ropes of thick cum like that nozzle gushed out water mixed with pussy juice when she did that!