When you were a kid, if other kids were shitty to you, you probably grew up into someone who didn’t want to have kids.
Ned grew up bullied and beaten, and didn’t he have many friends growing up.
He tried dating, but so many women wanted to get married and have kids.
So, sure, he fucked around, but he always wore a condom.
And the women who’d poke holes in it to trap him, well, they still didn’t get pregnant.
You wear a condom to keep from getting an STD, but get a vasectomy to prevent the real disease… kids.