A lot of people kiss their pets or non-human animals in general. I find that very weird. I understand that it is a sign of affection but it seems so off. One reason is that I doubt whether animals really understand this. Also it seems to be on a level of intimacy to me that I find weird sharing with a pet. Not necessarily romantically or sexually (that would be even more weird and wrong and probably illegal). But it is still "more". I am not sure whether I can really explain why exactly I find that weird.
Anyway, what is something that is weird to you but not to most other people?
It might be an imperative for the human race, but not on an individual level. There is no must ... there is no law in the universe that says that we must continue.
In line with the other commenter, I can only speak for myself. Nothing about parenting is appealing to me, and I can't even think of one aspect of my life that would improve. A long list of cons with no pros. I've accepted that people are just wired differently. For me it makes no sense, but others go through great effort and expense to become parents (e.g. those with fertility issues going through various treatments).