-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.
If by “fuc” you mean pushing cloaca at each other then yes they fuck. But for most bird species males don’t have a penis for penetration
What is it for then?
it is a short tube inside the cloaca used as a outlet for the sperm so it can flow out of the male cloaca.
Sexy