tyson beckford*From the Why Tyson Beckford, Why? department comes news that a sex tape, said to feature the male supermodel, is being shopped around the adult entertainment community, according to TMZ.

Sources say the seller insists the 45-minute tape shows the former Polo model pleasuring himself during a recent Internet video chat with a female model.

We’re told … during the chat session, Tyson makes references to some of the movies he’s appeared in … and talks about some of his co-stars.

Sources say Beckford also reveals one of his pet peeves — being mistaken for Tyrese Gibson.

A rep for Beckford tells TMZ … the model’s camp has not seen the footage and will not release a statement until they can view the material that’s being shopped.

Developing …