UFC Fighter Sports Gay Proud Shorts at Weigh-In

One super sexy Ultimate Fighter is bending over and showing off his underwear in support for gay marriage.

As the Huffington Post points out, UFC fighter Kyle Kingsbury announced his retirement Saturday but also made a surprising pro-gay move when he went to some pretty fantastic lengths to show the LGBT community he backs same-sex marriage: Over the weekend, the athlete revealed he was wearing pink underwear that read "Legalize Gay" over his bum during his weigh-in against Patrick Cummins after he dropped his shorts.

Kingsbury, 32, lost his match to Cummins and the bearded fighter also announced his retirement. Damn, just when he was getting my interesting UFC fighting!

Over the weekend, Kingsbury also took to Twitter and wrote:

"In my run it felt like peaks and valleys but in the end I am completely grateful for it all- every beating I delt out & every beating I took... I've learned more about life in the small window I've fought than in any other venture. Life only continues to get better. I love you all :)"

He later added: "A good friend told me last night "the second you stop trending on twitter... ANNOUNCE YOUR COMEBACK!" #ComedyGold"

Watch the clip below and skip to the 25:000 mark to watch the athlete show off his "Legalize Gay" underwear.

This story is part of our special report: "Gay Marriage". Want to read more? Here's the full list.