Washington and John, who have been together for 11 years, said "I do" during an online ceremony at their San Francisco home on Tuesday as family and friends watched via FaceTime.
"While it wasn't a quick decision, the idea to do it this summer was spur of the moment," he said.
After the virtual ceremony, the newlyweds decided to capture their new bands in the natural light. John was holding Scooter in one of his arms as Washington tried to snap the picture.
"To be honest, I wasn't even paying attention when Scooter did it," Washington said. "I was trying to switch the camera to another setting. John kept saying, 'Look what he's doing.' And when I finally did, it was the perfect photo."
"A moment doesn't go by that he isn't working his way between us if we're hanging out on the couch," Washington said. "And he's always on surveillance duty. He suddenly appears whenever there's a quick hug in the kitchen. And, when caught, we immediately pick him up between us and make him into a Scooter sandwich. So, you could say we perpetuate this behavior."
Many on Twitter say they were touched by the photo, which has received more than 290,000 likes at the time of writing.
Washington's post also inspired others to share pictures of their dogs just wanting to be part of a special moment.
Washington said he was happy to see so many people share their own photos.
"We capture these joyful moments of unconditional love from our pets and then, just as quickly, they are forgotten," he said. "But, like any parent, all you need is for someone else to mention their kid to break out your own photos and start bragging."
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