According to Dink they approached him for that scene. They were piss drunk when they called him very late and said it's now or never. Dink met them quickly and they were already wasted when they got to the location. He was merely a catalyst much like the alcohol itself for these two to fuck, which they very clearly wanted to.
I've seen Cameron in other videos, he was absolutely taken by Erin and Erin by him. These two couldn't keep their hands off each other, and Dink thankfully immortalized this moment for our viewing pleasure.
I also don't think likening Dink to Cosby is fair considering everyone likely knows what they are getting into and consented before anything alcohol was sipped, any weed was rolled, and footage was recorded.
No one was unconscious or raped. Men like spaghettis are only "straight" until they get wet.