The thing is, even in a vanilla relationship there is a high incidence of people who have been abused.

Every two and a half minutes, somewhere in America, someone is sexually assaulted.
One in six American women are victims of sexual assault, and one in 33 men.
In 2004-2005, there were an average annual 200,780 victims of rape, attempted rape or sexual assault.
About 44% of rape victims are under age 18, and 80% are under age 30.
Since 1993, rape/sexual assault has fallen by over 69%.
Those stats come from Rape, Abuse, and Incest National Network.
(http://www.rainn.org/statistics/inde...feef69a68bdaa4)

My personal guess is that those statistics are on the low side. Either that or I have the dubious fortune of finding people who have been abused and adopting them as friends.

All that said, I will not run from someone, or exclude tham from my life, because of something that happened to them that was beyond their control. My responsiblity, as a human being, is to help these people in any way i can. even if it is only by letting them know that not everyone judges them based on their past.