Two drunk people can have sex. That's not unusual.I would be surprised.
How can you have sex if neither party consent?
Why would it be unusual? There are plenty of couples where both drink too much and shout at each other and have a generally destructive relationship dynamic.I'm really not getting 'many victims are also perpetrators' thing? Yes, there are cases where both parties will abuse each other, but that would seem like a fairly unusual and rare situation, rather than a 'many victims' thing.