In our last installment of Is It Porn?, 72% of you agreed that boob punching is NOT porn. We're glad that's settled, but we've come across a whole new confusing genre of possible porn -- workout videos on YouTube.

Denise Austin is a 51-year-old former gymnast with her own fitness empire, which includes books, television shows and yes, workout videos. But when we innocently typed the exercise expert's name into YouTube, we found a bounty of saucy clips with titles like "Denise Austin- Inner Thigh, Ass and Crotch Shot- Wow!!" and "Denise Austin spreads em WIDE." Most of the clips are under a minute long, seemingly too short for the watcher to break a sweat, unless the videos have some other, unintended purpose.

User comments like "I want her to do a video naked like this and spread her hott legs too" and "There's been a many a load dedicated to Denise" reinforce our suspicions that the calorie-burning clips have been repurposed for vigorous wang workouts. While the original purpose of these videos was clearly for fitness, does the fact that they're being used for masturbation purposes recategorize them as porn? See some examples and vote after the jump.