Lily: Wait, what are we doing here?
Marshall: Lily, our-our wedding vows, maybe they were just too perfect for real life. Real life is messier than that, and... we're different people than we were in 2007. But that's okay. Maybe we just need some updated vows. So I thought maybe before this place gets too busy, we could borrow this altar for a minute. Lily Aldrin, I vow to stop shouting stuff at you when you're dumping out. You're the love of my life, and you deserve to make a deuce in peace. I vow to stop pointing out every dog erection we see when we walk through the park, even though they are incredibly weird looking.
Lily: Oh, just don't point and scream, "Maybe it's Maybelline." Marshall Eriksen, I vow to always tell you when you have green stuff in your teeth. You have green stuff in your teeth.
Marshall: Oh. I vow to always sit next to you and hug you, even if you're covered in vomit, whether it's yours or Marvin's or, in the case of what came to be known as Spew Year's Eve 1998, my own. Sorry.
Lily: I vow to stop getting so angry...
Marshall: Ooh, I just thought of another one.
Lily: ...when you interrupt me.
Marshall: Mine was to interrupt you less, so that's good. I vow to finally stop petitioning Paul McCartney to let Weird Al record "Chicken Pot Pie" to the tune of "Live and Let Die." It's over. I'll let it go.