Good Vibrations

Darryl Curtis has been listening to his flatmate, Jessica, masturbate with her vibrator every night for months. He can’t stop thinking about what Jessica does with the toy and it is this obsession which perhaps drives Darryl to use the vibrator himself.
He sticks the sex toy up his bum and keeps doing it to the point where he is too wracked by guilt to even talk to the girl he’s been secretly lusting over… that is until she invites him into the bathroom where Jessica asks to substitute her sex toy with Darryl’s fingers.

Where will Darryl ask Jessica to put her fingers in return?