This piece of information is from Bheel Mahaabhaarat. It is indeed quite different from what we read and hear everyday ---

If somebody takes the sex in a religious book, it seems that there is no other book compared to Mahaabhaarat in that matter. All kinds of sex matters have been occurred or mentioned in it - premarital sex (Kuntee, Satyavatee), extramarital sex (Kuntee, Madayantee,) as if those things were normal and common in those days, or was looked at it with respect; and cross dressing (Saamb as a woman) too. Unnatural births - y hitting stones on the stomach (Gaandhaaree, Madayantee, Vinataa), or prolonged pregnancies (Gaandhaaree, Madayantee, Vinataa), or even immediate child birth (Ved Vyaas, Ghatotkach). It also seems that if the king did not have a son, an heir to his throne, he invited some Rishi and had a child from him on his wife (Ambikaa and Ambaalikaa had Dhritraashtra and Paandu in this way by inviting Vyaas Jee; Madayantee had her son Ashmak in this way by inviting Vashishth Jee; Kuntee had her sons through inviting Devtaa).

Draupadee had more freedom in this regard. She had the opportunity to have sex with five men, still at one time she craves for the body of Karn. She says - "I have been watching him practicing the display of swords and other weapons. My body and mind craves his strong embrace."

This incident is given in Bheel Mahaabhaarat - "One day Draupadee was sitting in her palace and a strand of her golden hair beaks and reaches Vaasuki Naag living in the dark dungeons of the underworld. Seeing that hair he goes crazy over that strand of hair and decides to go to Earth to find the owner of that strand of hair. He mounts his horse and comes to Hastinaapur. Now quoting from Bheel MBH - "Seeing him approaching, Draupadee gets up to go to the inner chambers. But before she can do so, Vaasuki swings the whip and lashes it at Draupadee’s thin waste. Draupadee runs, falls down, her scarf moves off her head and Vaasuki realizes this is the woman he has been looking for. He rushes towards her and falls over her. Draupadee shouts at him and asks him to get away if he wants to remain alive, for the Paandav would kill him if they come to know of his being here. Ignoring her words, Vaasuki picks her up and carries her to her bed."

Draupadi falls for this guy wondering who he is and bathes him. Meanwhile, Arjun arrives to the scene. "The fight that ensues is terrible – it takes the two of them down to Paataal, back to the earth, then to the skies. Eventually Vaasuki defeats Arjun, and sitting on his chest, ties up his hands and legs with a hair pulled out from his moustache. He then hoists him up onto a peg on the wall." That's right, Arjuna is bound and hangs on to the wall.