I want to share with you an excerpt taken (with permission, of course) from Tim's personal online journal written in 2003:

One of the first things Jessica and I had "bonded" over, of course, was our love of ketchup. We'd both spent our lives being mocked by friends and family for how much ketchup we used, and for both of us, a meal from McDonald's was just ruined if they were out of ketchup. During one such visit the day after our first kiss, McDonald's was decidely out of ketchup. We immediately decided to run across to a nearby convenience store, to buy a bottle of ketchup before we grabbed our McDonald's, and then we went back home. I remember so clearly walking down bustling South Street with her, I remember walking into that store, just feeling on top of the world, I remember thinking "this is one of those silly little moments I'll be remembering the rest of my life. And the best part is, I'm aware of that now, I see that now, while it's still only just happening.
In my online journal, a mid-April entry contained the following sentence: "Bought cheesesteaks from a roach coach and ate them under a tree in a park." That was another of those moments. We were sitting under a tree in a park in the middle of the city, eating our Philly CheeseSteaks (with copious amounts of ketchup), and I found myself doing it again. "I'm so happy right now," I thought. "This is another thing I'll always remember, this moment right here." I told her what I was thinking, and we talked for a while about how we both do that a lot, identify some event as a happy memory of us together we'll be looking back on for years. "Like this," she said. "Years from now, you could say 'cheesesteaks and ketchup' to me, and I'll immediately remember this moment, how happy I am, how wonderful everything is." "Cheesesteaks and ketchup," I murmured, and another term was added to our little private vocabulary: whenever either of us says "cheesesteaks and ketchup" to the other, it means "this is a moment I'll be happily remembering for years to come."

For the past three days, Tim and I have diligently uploaded, sorted, and captioned 738 photos for the Photo Gallery. And these photos cover everything from the last few months prior to our departure up to our stay in El Bolsón, Argentina. (We stopped in Mendoza after El Bolsón and are currently in Buenos Aires again, but we're going to make you wait for those photos.)
I would go so far to say that every single one of these photos (as well as the other 2,500 we took but did not put on the website) are cheesesteaks-and-ketchup moments.
They mean that much to me, every single one of them.
You see, these photos capture our dream of traveling the world together. And for that, they are absolutely priceless.
So, go! Go now and look at our Photo Gallery! And then come back here and tell us what you think.

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I'm so glad you guys are having so many cheesesteak and ketchup moments!
Moving right along… I looked at the photo of Cerro Piltriquitron and still can't pronounce it correctly! Does that mean I have to stay up all night and look at it? Just wondering…
OK enough post hogging! You both know that I miss you VERY much and that I can't wait to see you again. Take care of yourselves, keep writing, keep taking photos, and know that you're constantly in my thoughts/prayers.
*Hugs, Peace, and Love to everyone out there!*
~~~~The Post Hog
Love! to both of you.
Keep up the great work.
While not generally a fan of ketchup, your private joke is wicked-cute.