it's implied that he's slept with female omegas before as he's never been with a "male" omega at least. Secondly anyone who refers to their partner's butthole as their "asspussy" is suspect to being a douche or Sakyo Aya really needs to be introduced to a sane gay male as an actual model of reference. Some MSM do in fact like to be dominated in such a way that they're ridiculed and degraded by their partner as a turn on fair enough, that's even the case in good ole fashioned S/M play but he's going into heat for the first time , I doubt this would be the time and place to degrade him to the point of being only worth a sexual orifice that's just tacky .

Am I the only one whose inner alarm practically screams “Sleazebag!” at the alpha..?
I don’t really know what it is about him that makes me uneasy... It’s not like he is forcing our sweet omega into sex. ( ̄∇ ̄")
(Though the sex will undoubtedly be steaming hot! ε=ε=(ノ≧∇≦)ノ )