>>938869370
More often than not, it wrecks the birth canal. Women who have had kids through natural birth can suffer from incontinence just from laughing. An epidural can mess with the nerves and signals being sent to the brain as well leading to a weaker bladder.
You obviously haven't been with many women. Out of the 15 or so single mom's I've been with, 14 have offered the whole hot dog in a hallway experience and a bunch of queefing noises as you continually pump air into her cheddar box.
Beyond that, factor in how much noisy distraction a woman creates on her own. Either constantly yapping like the off switch is broken or dragging you into unnecessary drama with feelings she believes to be real. Multiply that noise, drama, and distraction X 10 for every kid she's brought into the world.