I'd like to be able to alter body hair density based on climate.

Remove hangovers

For some reason when I read this I read "Reticulating Splines" instead of reinforced spines. I was like wow random sims reference.

What's the laryngeal nerve and what's wrong with it?

added ability to change biological sex

PLEASE

I like baldness and body hair! They should be optional too

i'm not sure i want to know what the first point would look like, moving either the genitals or the anus sounds horrifying, and i especially don't want to imagine where penis wielders would urinate or ejaculate from if those functions are separated..

..perhaps we'd do like octopi, reach under and fetch a sperm package that we present instead of a wedding ring? Or maybe let's just leave it like it is and not create horrors.

Let’s also reroute the ulnar nerve, thx

Reabsorption of uterine lining is called being "in heat" in dogs and cats. It's quite common in the animal world, and it makes all the males very rapey.

One of the prevailing theories about why humans pair bond is our males can't tell when our females are ovulating/menstruating so it's advantageous to be kinder and stick around for more sex.

TL;DR: I think that's not a great idea.