Yes, I did mention that there are some men that likes to do things that women were traditionally expected to do. But I will have to bring up the fact that even in the "modern era", most women in the world were still expected and in fact do still take up traditional womenly roles (for example, even if women do work outside of the home, they were still expected to do chores at home and there are probably more housewives than a male homemaker).
Yes. They differ in degree/intensity but they originate from the same root.
The difference lies in that women is the one who actually needs to get pregnant and give birth. It's absolutely neccessary for the women to have maternity leave. Just by merely having the excuse to take care of the children does not cut it. If that excuse makes up the basis for the maternity leave then why not have 10 years, or until the child goes to university (19 or 20 years) of maternity leave? Have you checked the maximum number of weeks of maternity leave? In Canada, its 24 weeks maximum. Mothers need maternity leave because they need the period to recover from pregnancy (its for medical reasons). However, paternity leave would be "nice" and a "luxury" to help out the mother (except in rare cases where there are intense medical complications from the pregnancy and there are no other available relatives to help out). Paternity leaves are just not as necessary as maternity leaves because they don't get pregnant. Seriously, for practical reasons, not only is it not in par with cultural norms but if paternity leaves were to be available for all males then there would be a high rate of unemployment which in turn would be bad for the economy.
You mentioned that men don't file for complaint because they feel they won't be taken seriously. In that case, then its the men who are bias against themselves (that wouldn't be anyone else's fault). You also said that the success rates are like playing with the lottery. I don't really understand what you are saying. Under the law, everyone regardless of sex is protected for sexual harrassment and the judges are intensly screened for biases. Do you have a case study that shows this bias? I understand sometimes you hear people talking about a case which on the surface sounds like the judge made an unfair decision but those people don't really know the case at all or know the details of it.
I think you have the right intentions. But you need more specific examples to back up your claim. And because (from my understanding) not only did you argued that one specific case reflect gender bias but you've made a grand claim that law and court decisions reflects gender bias, you need a significant number of cases to back up your claim (thats for the sexual harrassement case).
How serious are you about this gender bias thing? Are you considering lobbying for it? Or are you just talking about it on loveforum? If you are serious, you need a stronger argument.