You never know, your one trial after marriage could bring fort a quadruplet or even a Sextuplet! It's never bargainable, your wife could produce so many eggs at the same time plus your own 1 Millions sperms swimming furiously to catch an egg...you might be in luck! Haha
I don't mean to scare you, but your need a threshold of Psychological fortification to stay sane in this phase of life. I Want a set of twins so much, but if I get more(lets not get into that)...But when and if that happens, are you equipped for it? For single folks like me, it looks more like a financial complications in starting to have kids, but there's a more delicate and complex part of this humongous responsibility - The Psychological aspect of it!
What will you do if your three or four kids, maybe more all starts crying all at once uncontrollably in the middle of the night? Sure you know it's not the wife duty alone or the husband duty to tend to that right? Patriarchy doesn't apply when you start raising offsprings especially if you are blessed with more than a baby at once; This is part of the Extra Max Pro Parenting part!
Our live comes in stages and each phase has complexities, the adult parts of our lives is where you cater for the family and make provisions with the wife as support(from a Man's angle), luckily if you are blessed with more kids at once then congratulations ; you were or have been inducted into the Parenting Extra Max Pro Hall of fame!