-Easier birth control: Make the egg into an omelette
-Relaxed child support laws: Requires deliberate decision to incubate the egg
-Clean packaged periods: Egg = No mess!
Although, there would be stories about partners hiding fertilized eggs: Instead of unplanned parenthood we would have unconsensual parenthood
There’s probably more nuances I am missing. But do discuss it in the comments.
Edit: don’t ask what happens if the shell breaks while it’s still inside. You don’t wanna know. Be thankful you’re approaching this evolutionary step voluntarily and not due to natural evolution. Evolution sometimes decides that those kinds of questions aren’t worth bothering with. You’re lucky though. When the time comes, you’ll get to choose how you want your eggs done.
I wasn’t gonna until you said this
Is this how you get chicken nuggets?