No matter how we fantasize not involing financial capabilities with marriage, it will always be a factor. Things would change once you build up your own family and that also includes calibrating your financial responsibilities; if you don't have that much of money then problem may arise. Love alone can build a family but won't sustain it in a long run; we have to be practical of how we would handle things before entering this phase of our lives. Inagine having no enough money; daily needs wil be a problem, most of the time stressed of the bills, not being able to give your child the life you want he/she live in the futurec, etc. Courtship is different from marriage; never too confident of how things would go after marriage so better be prepared.
Yes; this is definitely true, if you are married then you are going to have higher expenses. The thing about the differences between women and men is that men are simple creatures, we are really fine with not seeing the wonders of the world, we are fine staying at our home, drinking a beer, watching a show and sleeping.
In fact, it is so much so that, if you provide a men enough money to just be able to afford bills, food and a decent enough shelter, most of them will not require anything more, you literally have all your expenses covered, maybe medical bills if anything happens, but as long as they can wake up, eat, drink a coffee, read the news, nap, wake up, eat dinner, watch tv, and go to sleep without going to work and still paying for all this, that is as good of a retirement as it gets.
Women are not like that, they want more, they see others having more, and they want more themselves, so that difference could cause a bit of a trouble in marriage if you are not careful, both sides needs to meet in the middle.