The girls grope themselves

The women began to grope and feel themselves up, gripping their boobs and butts tightly as they tried to figure out what they were.

Ren had a thought.

"Girls, forget how not to orgasm."

The three of them let out low, soft moans as their legs buckled slightly. Clearly, they were orgasming. That meant that telling them to forget something that was basically a constant could work, as they no longer remembered how not to contain their orgasms and the simple act of just touching themselves was making them horny.