I'll be answering this tomorrow, after I got some sleep ;).

haha alright. good night!

It doesn't matter if the parents are two men, two women, or one man and one woman.

In the case of same-sex couples and raising children, one person will be the more "nurturing" one while the other will adopt the "discipliner" role. What matters the most is that children have parents that give a crap about them and care for their well-being. Supportive parents that are going to be accepting and fair as possible.

Also, aren't most households in the US single parent households anyway?

I honestly feel that a male and female parent being present in a child's life was far more relevant in the past than it is now.

Years ago, there were very clear distinctions between what a man should do and what a woman should do. There were almost exclusively men in the work force, and women were to get married to the most supportive / wealthy man she could, cook, clean, raise children, and such.

Now, we have progressed and women are in the work force, gender roles not being as "necessary" in our society. A single woman can now more than easily support herself, and the man is not needed to be the bread winner in the family. The playing field has been evened out a lot in that respect.

There are people who still hold more traditional views on "family" and still adopt the more traditional roles within said family, but there are now an abundance of even heterosexual couples in which both parents work or even have "stay-at-home dads" instead of moms.

Times are changed completely. A child doesn't need to be taught their place in the world as a male or female, moreso as just a human being. As long as they're being loved and nurtured, they can do perfectly fine in the world. The gender of the parent(s) is completely inconsequential in my opinion.

Yeah, I think its important to not confuse gender with role. I know mothers who can be as cruel and rule-oriented as a traditional "father figure."

And father figures who are much more nurturing than mother figures.

Men who dislike other men acting like women are really just misogynists.

Lawl, i disagree with that.

Men who dislike men who dislike other men acting like women are almost a Blur song.

The point is, in the time children grow up they have different phases in which they lean more toward the father or toward the mother. I'm not sure what causes this and I'm not sure which parts of the father and mother are of interest to their education/upbringing.
I'm not sure whether it's really a problem that there's an actual father and mother, or a father and mother figure.
What I do know is that in my experience, boys who are raised by two mothers (and I know two of them) are a bit soft, seem a bit gay in their behaviour. Something like that might cause some problems with social acceptance.

I'm not sure about these things, it's all pretty hypothetical.