Definitely! It's not just with cheating though. It's with everything male female related.
Abuse
If a woman is being badly treated (ie yelled at, etc) it is abuse and she should contact women's aid and get out ASAP.
If a man is treated badly, they ask 'but what did he do, to make you act like that. He must have treated you horribly for you to do that. Poor girl'
Maintenance payment.
Dad should always pay, the insufferable bastard. Oh he took a paycut and had a new family? 'there is no nuance, he cannot leave his family high and dry and think he can galavant with his new family?? Pay up!'
Moms on the other hand.
Oh you've lost your job, he can't expect you to pay?? Surely, he should realise you have a new family to support?
There was a thread here recently where a mom was the resident parent and thus received maintenance form the father. The dd then moved to her father as a main carer as the mom wanted to study and people said 'no you'd be cruel to stop paying maintenence! It's not morally right, she trying to better her life, pay!
If it was a man they would say, cheeky fucker, trying to study to get out of CM payment.
Even with teenage /young adult relationships. The young boys must dare to do xyz. The girls 'ahh she's still young, we all make mistakes'
Its sickening to me rally and put me off of mumsnet a lot. But I guess it just mirroring current society where a straight white male is the epitome of lucifer. And amuthing inexplicable is always the patriarchy! Even women's bad behaviour, 'we've been conditioned through the patriarchy'