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from www.tmz.com – A man claiming to be James Holmes created a profile on a popular sex website just days before “The Dark Knight Rises” massacre … in which he described his penis as “short/average” … and law enforcement sources tell TMZ investigators are now looking at the site to determine its authenticity.

“Holmes” created the profile on AdultFriendFinder.com July 5 — and included a picture of himself with reddish, orange hair … just as officials in Aurora, CO said he looked when he was apprehended Friday morning.

“Holmes” — who used the screen name classicjimbo — included a cryptic message on the top of the profile which reads, “Will you visit me in prison?”

In his profile, “Holmes” says he’s 6’0″ and single … with an athletic body. Note — the FBI says Holmes is 6’3″.

“Holmes” describes himself as a “light/social drinker” … but in the section where he’s asked if he smokes or does drugs, he answered, “I’d prefer not to say.”

“Holmes” also noted that he’s circumcised.

“Holmes” described himself as a straight man … and said he was seeking a sexual relationship with “Women, Couples (man and woman), Groups or Couples (2 women).”

“Holmes” also notes that he’s interested in “Erotic Chat or Email, Discreet Relationship, 1-on-1 sex or Group sex (3 or more!)”

In the section marked, “Introduction” … “Holmes” said, “Looking for a fling or casual sex gal. Am a nice guy. Well, as nice enough of a guy who does these sort of shenanigans.”

According to the website, “Holmes” last logged in to the site sometime in the past 3 days.

“Holmes” posted 2 different photos of himself — including one shot in which he is posed in front of an image of a woman while wearing headphones.

If it turns out that it is indeed Holmes’ profile, the information could be relevant in the investigation.