In short, there is absolutely nothing about having kids that appeal to me.
I don't want sex, getting pregnant, giving birth, wiping noses and behinds for years to come, follow up on everything from birthday parties and tantrums to security, and raising the kid and teach it values, needing to be there for the kid for at least 18-20 years, maybe more. Add to that that kids are monetary black holes, and that I generally can't stand them.
I am way too selfish, the very thought of it gives me something close to panic. the phrase ball and chains comes to mind, because that what it feels like to me. If you're gonna have a kid, the kid must be first priority for you in your life, and that's not something I wanna be stuck with for decades to come.
I need my freedom, be able to do what I want when I want. I am not willing to sacrifice it.
In addition, I couldn't imagine living with kids. When I was 12 (Twelve, meaning that I was used to noisy kids from school), I visited my relatives up north. During that vacation we lived 2 days with my aunt and her daughter and the rest of the time we lived with my grandmother where my other cousin lived. My cousin (7 years older than me) was very social and just seeing all the visits he got, made me feel tired. My younger cousin was 9 1/2 and she was very tiresome. Exuberant, vexing, hyper, very strenuous. I have never been happier about being a single child. A few weeks later I got home to my calm life with parents and pets, and it was wonderful. Having someone like her run in and out, playing, yelling, up and down like a yo-yo, or a kid always having lots of noisy friends over, all day, year after year, would've driven me nuts. Same with the social one, even though he was calmer.
Home-time is me-time, alone-time, relax-time. Not overwhelming nerve- grinding us-time.