The mixed martial arts world is filled with noble fighters who have become great ambassadors for the sport.
Guys like Randy Couture, Chuck Liddell and Matt Hughes have left behind legacies while leaving behind a relatively squeaky clean demeanor.
Well, not so much Liddell, who has the libido of a young college kid at a frat party, making him largely inappropriate to be around anybody's sister.
The following are 11 other MMA fighters you would NOT want to date your sister.
The proverbial wild man, Jason "Mayhem" Miller may be a colorful and enigmatic figure in the sport, but you know any guy who walks out with that many attractive women at once is bad news.
These two no-nonsense, reserved and brash fighters don't exactly strike themselves as "approachable," so if you catch them anywhere near your sister, make sure to have some medicinal substances in hand to create an equivalent exchange.
When Shinya Aoki begins wearing his own sister's clothing, you know that the notable lightweight star doesn't belong anywhere near your own sibling, especially not in that getup.
Though he looks fairly content as it is with his friend and teammate Masakazu Imanari.
The Brazilian fancies himself a "foot" man. If you don't know what I mean, just google it.
I bet you can't guess which one is Nagashima.
If you guessed the one on the right, you're wrong.
No, that's his alter ego "Jeinotsu," whom often dons women's apparel come fight time.
Nagashima, you can always shack up with Aoki if all else fails, seeing as how you two are fairly familiar, what with you knocking him out not all too long ago.
A bubbly personality with boyish good looks, Faber is a terror for any girl looking for commitment.
"The California Kid" is in a constant state of motion, whether it be between his Team Alpha Male clan in Sacramento or the many hoochies (see picture) that ransack him.
Overeem looks like he has his hands full.
You don't want your sister becoming an Alistair groupie. It's already a growing epidemic as it is.
“Frank Mir had a horseshoe up his ass. I told him a year ago. I pulled it out and I beat him over the head with it. I’m going to drink a Coors Light. That’s right a Coors. Bud Light don’t pay me nothing...I may even get on top of my wife tonight."
Nobody needs somebody that crass joining the family any time soon. Besides, I'm not sure if mom and pop would take issue if Lesnar decides to tell the world of his extracurricular activities with your sister.
If you watched Season 1 of The Ultimate Fighter, then you already know the short-tempered ways of Chris Leben.
"The Crippler" has many of his own personal demons he's been battling for years, and to add your sister into the whirlwind fray of Leben is just asking for trouble.
He has enough on his plate as it is.
If Gilbert Yvel is willing to tarnish his own career by knocking out a referee mid-fight, what do you think he will do to your sister after she forgets to DVR his favorite episode of Adventure Time?
Chael Sonnen makes a living off disparaging some of the best in MMA.
No one is safe in the destructive path of Sonnen, much less your sister, who forgot to put 12, not 11, chocolate chips in the cookie batter for his birthday.
How dare you, ma'am.