Here's a shocking answer:
1.Male
2.Strongly Agree
3.Strongly Agree
There are absolutely no logical reasons as to why they shouldn't be able to do either of these things. For the most part anyone against it is basing this off of their (in my opinion outdated and misinterpreted in the first place) religious beliefs. Religious laws belong absolutely nowhere near real laws.
No specific religion owns marriage, it was not created by or for Christianity, it was going on long before it existed. And its main purpose in society was just to keep track of who was paired up, the religious parts of the ceremonies came later.
As for kids, with divorce rates so high, plenty of single parents, and tons of kids up for adoption that's a perfect way to help raise kids. Sure plenty of people will get made fun of for having two moms or two dads in school, but kids will make fun of each other for ANYTHING, its just a matter of what. That's no reason to ban it, you just have to tough it out and wait for social opinions to change.
That would be like saying black kids never should have tried going to white schools when it was first legal because it caused a problems for a while. And how the hell would gay parents be a bad influence? I'm pretty sure gay people are very unlikely to be ones to try and tell their kids what their sexual preference has to be.