How I Met Your Mother might not have ended the way we all wanted, but the series is still a wonderful piece of comedy, thanks in large part to the relationships forged by these beloved characters. The show is celebrating the 10th anniversary of the series premiere today, which reminds us of all it has given us over the years: oh-so real moments, lots of laughs, and one of the best love stories ever. No, we're not talking about Ted and the Mother or Ted and Robin. We're talking about our favorite couple: Marshall and Lily.

There are so many reasons Marshall and Lily (played by Jason Segal and Alyson Hannigan) are the epitome of #relationshipgoals. And they all come down to one obvious truth: how Marshall and Lily show their love for one another. Their relationship is cheesy, adorable, messy, and always real. In short, it's just about perfect. Here's why we love them.

via GIPHY 1. Marshall and Lily Have the Cheesiest, Cutest Nicknames They are Lilypad and Marshmallow, they're adorable, and we all just have to get used to it.

2. They Use Code Words for Sexy Time

Marshall and Lily's healthy sex drive is a well-documented fact on the series--and when one of them is in the mood, it's always obvious thanks to their code words. The fact that they're trying to be discreet with code words like "chimichanga" is really sweet (and also a little TMI, but who cares).

3. Marshall Has a "Night Night" Song for Lily When Marshall and Lily had to spend the last week before their wedding apart, Marshall made Lily a "Night Night" song that had Barney gagging. But we thought it was pretty damn adorable.

4. Marshall and Lily's Lullaby for Marvin