I couldn't stand the idea of a smaller version of myself, mirroring everything I hate about myself.
I also couldn't tolerate the number of people who would suddenly be entitled to interfere in my life - health care professionals, teachers, social services.
I wouldn't want the expense.
I wouldn't want the anxiety if they went off the rails when they hit their teens.
I'd hate it if the child happened to be a thicko.
I wouldn't want to have to do stuff like look after them if I was feeling ill or depressed.
I wouldn't want the hassle of childproofing the house; having to put things like bleach in inconvenient places, not being able to have painkillers in the coffee table drawer, having to put a PIN on I-player etc.
I'm not capable of being a good example to a child.
I wouldn't like changing nappies and generally having to clean a child.
A child might upset my cats, who I love beyond measure.
Probably more reasons.