Details come from TMZ (sorry):

The suit claims Travolta stripped naked, appearing semi-erect. The masseur says he told Travolta to lay down on the table and the first hour went without incident. Then, according to legal docs, Travolta began rubbing the masseur's leg, touched his scrotum and the shaft of his penis. The masseur claims he told Travolta he did not have sex with his clients, but Travolta was undeterred, offering to do a "reverse massage," adding, "Come on dude, I'll jerk you off!!!"

The suit goes on to allege Travolta then masturbated and told the masseur he got to where he was "due to sexual favors he had performed when he was in his 'Welcome Back Kotter' days," adding "Hollywood is controlled by homosexual Jewish men who expect favors in return for sexual activity."

Full skeezy report here!