I think it's because in this story, being a dominant omega,which is dane's second gender, is EXTREMELY rare as the novel says, they can knock out alphas and control their pheromones, need more than 3 alphas to make them in heat, has a high chance of getting alpha babies, so most of them are being hunted and such for use, that's why maybe dane is furious if anyone finds out about his 2nd gender. Although yeah using a bottle to smack the shit outta someone is a funny but crazy move lol.

Grayson better than me cause he would've hit me in the head with a GLASS BOTTLE just because I ask if he was an omega. We would've tore the whole club up Dane would've been knocked on his ass. The whole fire department,police department, security, bartenders everyone in that fucking club would've been trying to get me off Dane Ass. Fuck a fated mate you finna get yo ass whup. I mean I might kiss the wounds tommorrow but you definitely finna get fuck up tonight in not in the fun way I like.