"You can't resist the urge to masturbate in public"

Her heart was pounding when she woke from the nightmare. She was sitting on a bus, a normal trip at least in the dream's context, when felt an irresistible urge to start masturbating. She fought as hard as she could - she couldn't start fingering herself in front of this crowd, right? But she couldn't resist. Her hand reached into her pants, everyone was staring at her, looks of lust, looks of disgust, looks of shock...

She woke up, the memory of her humiliating dream compulsion seared into her.