omega anti-rape mechanism

Uhm so we know how omegaverse works. Pheromones. Omega and alpha who cant control themselves. Rape. The whole spiel.

What if we give the omega an anti-rape upgrade? Retractable teeth embedded into the lining of their rectum. It comes out when they dont wanna have sex with whoever is trying to rape them. My best idea yet ヾ(❀╹◡╹)ﾉ~