A video-calling service for the deaf is suing a Brooklyn man for abusing the company’s software, the New York Post reports. David Marcano allegedly made 4,646 calls using the Florida-based service, ZVRS, solely for the purpose of masturbating in front of its employees.

Here is how the service works, according to the Post: via video chat, a deaf person calls one of ZVRS’s sign-language interpreters, who then acts as an operator, placing a call to a third party and translating on the deaf person’s behalf.

But Marcano, 51, isn’t deaf. Since January 1st, he has made over 4,000 calls “for the sole purpose of masturbating in view of ZVRS’s employees,” ZVRS says in a suit seeking unspecified damages.

“In every call made through ZVRS’s software platform, Marcano appears on the video call for the purpose of exposing his genitals or masturbating to ZVRS’s female staff,” according to the suit.