A lot of my friends who don't follow bodybuilding think I am gay because I have 100+ bodybuilding DVDs.
To be honest, I don't blame them, but I am as straight as a person can be on scales of sexual orientation, and I'm a very open person and liberal in the sense that I wouldn't hide private affairs of that nature. But I can totally understand why some of my friends think I'm gay. 
I guess being a connoisseur of cunnilingus doesn't redeem myself either. 
I've been through a scenario similar to the one you mentioned. A guy saw posters of Bill Pearl and Sergio Oliva (which I got from IronMan magazine) on the wall of my dorm room in college. While half-asleep, I heard him tell my roommate that having those posters was "gay". I guess he didn't see the picture of Tonia (the girl I was dating at the time) in plain site, next to my TV.
I don't have a lot of DVDs. Most of my bodybuilding media is free sample VHS tapes I got, when purchasing supplements such as:
- "Up Close with the Mega Mass Champions" and "Muscle & Fitness Workout Preview", both of which I got inside those 12-lb. bags of Mega Mass 2000
- "Mass Building and Training Program", which came with the Lee Haney's Mass Fuel Kit by Twinlab.
Others are bodybuilding shows, recorded off TV, like:
- Episodes of
American Muscle from 1991, 1994, and one from 1995 that I can't seem to find (may still be at my mother's house).
- Episodes of
WBF BodyStars from 1992.
- Footage from the 1991 WBF Championship, shown on WWF Superstars one week after the show took place.
- The 1992 WBF Championship (bought it on PPV and recorded it)
- The 1993 Mr. Olympia (or at least, the chopped-up version from ESPN).
The DVDs I do have are of "Pumping Iron: 25th Anniversary Edition" that my wife got for me. And the ones that from MuscleTech that came with the jug of CELL-TECH I got almost two years ago.