No wonder they've been married 27 years.

2016 Getty Images
| Credit: Sean Gallup / Getty Images

When Texas high schooler Sydney Willoughby asked her dad for help with an essay about him and her mother, she had no idea she would be getting a lesson in love.

The sweet exchange happened over text message, and Willoughby was so inspired by her dad's words that she shared the screenshots via Twitter. And it wasn't long before the tweets went totally viral.

"Your mom basically asks me to marry her … two weeks later I was absolutely madly in love with your mom. She was more than a dream come true for me," wrote Lance Willoughby, a military veteran.

He continued in great detail about the hardships of raising a family, working long hours, going to school, and spending too much time apart. But after the birth of Sydney, their third child, they fell in love with each other all over again.

"I've learned that it's easy to fall in love with the same person multiple times," he said in an interview with ABC News.

Although Lance and his wife met under "odd circumstances," he says it resulted in the "coolest family ever," full of heart, soul, humor, kindness, and integrity. And 27 years later, the couple's love for each other and their family keeps on growing.

That said, Lance does admit he was slightly peeved when he learned that Sydney posted the personal exchange on social media, but those feelings didn't last long.

"When [Sydney] first told me, I was like, 'You posted what? My personal text messages?'" Lance said. "But she did it with good intentions and it was sweet how she did it."

In fact, the whole thing inspired Lance to get his own Twitter account — you can follow him at @h_oh_7_LJ.