Boy Meets Girl (1994)

A man meets a woman in a bar, the two go back to her flat and begin watching porno films. The man passes out and wakes to find himself strapped to a dentist chair. The woman, along with her accomplice begin to torture the man... Written by Sujit R. Varma
A woman picks a man up in a bar and takes him back to her place. He thinks he is going to get laid, she has over plans. She proceeds to drug him and incarcerate him in a chair in her basement before torturing him, physically and phycologically. It starts as an S&M excercise and goes to somewhere much much darker.