A future conversation: "Daddy, why did you name me Chelsea?" "Well... I named you after a girl I met on the internet, and... She was the most amazing person I've ever met ever (lie* because we all know LeonTrotsky is the best evAr)"
Congratulations, you will not get a good nights sleep for about 2 years, in my experience babies do not sleep well at all.
Me and my bro get in verbal debates that end in good old Fistfights, Make sure you don't favor the girl or the boy otherwise they will constantly compete for your attention.
That happened once, but my brother's 4 years older than me, so I ended up punching him in the solar plexus and kicked him in the hamstring. I felt bad afterwards though, although he was being a cunt. To avoid them beating each other up, just train them to hurt each other properly. They will gain some valuable life lessons along with it.
Bear in mind that there are women here. On average, an American female aborts 2 babies a week and shits out 3.