That's where I've always been confused. Every living being wants to propogate their species through innate biological urges and behaviors, whether they realize it or not. Obviously humans recognize these behaviors and are able to choose whether or not to actually have children or to simply act on these urges without procreating (condoms, birth control, etc.). But the innate biological inclinations are still there.

It's odd for me because I've never had these urges or inclinations for sex. Sometimes it makes me feel like I'm not human or something. Because every living being seems to experience this. Even when I discovered the concept of asexuality, I found that a very significant number of these individuals either oddly still had a sex drive or they were sexually traumatized in some way which blocked it. I have never had a sex drive and was never sexually traumatized. I was not a "late bloomer", as I'm in my 30s with the same lack of normal human feelings.