ET recently caught up with the former Bachelor star and his wife, Catherine, at their home in Dallas, Texas, where he opened up about how competing on season 16 of the dance competition show in 2013 was unhealthy for their relationship.
As many fans may recall, Sean proposed to Catherine during the season 17 finale of The Bachelor. He committed to doing DWTS shortly after, and was paired with dance pro Peta Murgatroyd. At the time, Sean and Catherine were just engaged, and barely had any time to get to know each other post-Bachelor.
"We went from The Bachelor to Dancing With the Stars, which was really... I didn't know the time commitment I was signing up for when I decided to do the show," Sean admitted to ET's Lauren Zima. "So poor Catherine moved from Seattle to Los Angeles, and I went to Los Angeles."
"I was rehearsing 10 or 12 hours a day, so my new fiancée was basically just on her own," he added, "which was really unfair to her, but being able to work through that and the challenges that you face because we barely knew each other when we got engaged."
His advice to fellow Bachelor and Bachelorette stars who have their eyes on a mirror ball trophy? Just don't do it!
"I would say, given my experience, it's probably healthier if you just skip it," he confessed. "But with that said, I can't fault anyone for doing it. I did it. I was an average guy who was approached and they said, 'Hey, we'll give you a bunch of money if you want to dance.' And I thought, 'Sounds fun, sounds easy and I'm an average guy who could use a bunch of money, so I'll do it.'"
Luckily, everything worked out in Sean and Catherine's favor. The Arlington, Texas, native told ET that after dealing with his gruesome DWTS schedule, he knew he chose the right girl.
"To be able to overcome that giant hurdle, I really felt like, 'Yeah, there's no doubt about it, she's the one,'" he explained.
Sean's former partner, Peta, is now competing on Dancing With the Stars' current 24th season with ABC's latest Bachelor star, Nick Viall. He, too, is newly engaged while doing the show, as he proposed to Vanessa Grimaldi during the finale of his season.
"I haven't shared any advice with him," Sean replied when ET asked if he's reached out and given any advice to Nick. "[But] I would say, your free time is limited on Dancing With the Stars, and every chance you get, just make sure you're spending it with Vanessa."
Although Nick and Peta have been in danger of elimination two weeks in a row, they received a high score of 34/40 from the judges on Monday night from their Pinocchio-themed jazz to "I've Got No Strings."
See highlights from their adorably fun routine in the video below!