1) Two people make a lot more laundry than one.
2) Two people make a lot more dishes than one.
3) The dishwasher in our apartment has made #2 hardly noticeable.
4) There is nothing better than drinking coffee together in the morning.
5) Living together is nothing like having your partner stay at your house overnight and share your toothpaste, even if you did that all the time before you moved in together.
6) Living together is way better and way more challenging than #5.