Having children just to feel fulfilled is like having a trophy wife, well it's a trophy family to be exact. It's not good, because having a child for that purpose is useless, and could be extremely harmful. My advice: adopt/raise kids if you really do want kids to raise, but if you don't then just don't adopt any at all.
1. It's illegal to engage in those forms of marriage, and those who do, are sick and twisted perverts.
2. Psychological trauma/damage will occur, meaning that the children/victims will probably have to take medication or go to a hospital, while the parents are sent to prison.
3. Another word for this is called sexual abuse, and it's extremely and highly dangerous, illegal, and disgusting
4. Your topics are highly perverted, and it seems you are spamming random/gross topics that are against this sites rules.
You can't prevent bullying for any particular detail. When a kid wants to make fun of another kid, the details are irrelevant. Bullies are sharks, they will find whatever detail makes someone unusual and relentlessly tease them for it.
What's important isn't making them immune to bullies, but making them the kind of person that people don't want to bully.
But how or what can we do this? I am not father already, but think about how a kid can be bullied because of the parents sexuality freaks me out. Specially because as I fight against a depression illness, I got totally worried if the kid (s) can, because of the bullying, got depressed too.