The perv who exposed his genitals to a bystander on the subway last week has turned himself in, according to cops.
A 28-year-old passenger was seated on a northbound 6 train at 125th Street and Lexington Avenue about 10 p.m. Sept. 6 when Matthew Cespedes, 22, of the Bronx was allegedly pleasuring himself in front of the woman, cops said.
The woman captured a photo of the man before he fled, cops added.
Cespedes was charged with forcible touching, public lewdness, sexual abuse and harassment.
![Matthew Cespedes](https://cdn.statically.io/img/vip.nypost.com/wp-content/uploads/sites/2/2019/09/subway-perv.jpg?quality=90&strip=all&w=662)