Oh, something is that back in the 2000s though strapons were still familiar from the '90s lesbian fetishization, "pegging" was still assumed to involve a woman using a handheld dildo on a man's ass, which I guess offered a different balance of control over the experience you were inflicting vs. experience of being the hip-thrusting penetrator
Maybe because playful '90s M/F couples were more likely to have a dildo on hand than a strapon.