I was outside of Battlehorn Castle trying to stop the siege. I killed the marauder warlord, who had some very valuable enchanted greaves. I decided it was best if I had them, and took them from his corpse, only to notice that he had no underwear. To make sure this wasn't an isolated even, I did the same to one of his marauder buddies, and to my character, only to find out that they were all going commando.
To remedy this, I deactivated my latest loaded mod (ImpeREAL Empire - Real Forts and the Lost Spires Patch for it) to see if that had any effect. As you could guess, it did not, as I'm here. Beyond the Unique Forts mod, I have no recollection of what mod was installed when, so I could use some help.

(Note: My load order is completely jumbled besides when the Deadly Reflex 6 installation guide gave me a specific order, and when I thought it was logical to put all the DLC at the top to be overwritten. Any critiques to my load order outside of my immediate problem would be appreciated as well.)

Load Order:

Oblivion.esm
Qarls_Harvest.esm
Jog_X_Mod.esm
HorseCombatMaster.esm
DLCOrrery.esp
DLCFrostcrag.esp
DLCThievesDen.esp
DLCVileLair.esp
DLCMehrunesRazor.esp
DLCSpellTomes.esp
DLCHorseArmor.esp
DLCBattlehornCastle.esp
DLCShiveringIsles.esp
Knights.esp
za_bankmod.esp
CapesandCloaks.esp
SentientWeapon.esp
Thievery.esp
Syc_AtHomeAlchemy.esp
300_Artifacts.esp
Cliff_BetterLetters.esp
Slof's Oblivion Pillow Book.esp
AyleidMeteorIronWeaponsVANILLA.esp
NakedNord.esp
Hand of Dawn - ONE.esp
RomancingAhnassi.esp
AnvilBayExpansion.esp
Qarls_Harvest.esp
Bag of Holding.esp
Bob's Armory Oblivion.esp
Ungarion1TheWelkyndSword.esp
100% Harvest Chance.esp
Castle Ravenpride.esp
ClocksOfCyrodiil.esp
Servant of the Dawn.esp
Adonnays Elven Weaponry.esp
Rainbows.esp
xulPantherRiver.esp
Adonnays Classical Weaponry.esp
DropLitTorchOBSE.esp
Ancient Silver Armor.esp
LoadingScreensSI.esp
LoadingScreensAddOn.esp
LoadingScreens.esp
bartholm.esp
Bartholm-Panther River Patch.esp
SP1stPLegs.esp
BeldaElysium.esp
The Lost Spires.esp
ImpeREAL Empire - Unique Forts.esp
ImpeREALForts+LostSpires Patch.esp
xulFallenleafEverglade.esp
xuldarkforest.esp
LostSpires-Everglade patch.esp
LostSpires-DarkForest patch.esp
Slof's Manly Stride.esp
Natural_Vegetation_by_Max_Tael.esp
Natural_Water_by_Max_Tael.esp
Natural_Weather_by_Max_Tael.esp
Natural_Habitat_by_Max_Tael.esp
300ft_crime_detection-7319.esp
MidasSpells.esp
Anduril Reforged.esp
HUD Status Bars.esp
Note to Self.esp
Oblivion Graphics Extender Support.esp
Deadly Reflex 6 - Timed Block and 250% damage.esp
Mounted_Spellcasting_Deadly_Reflex_Compatible.esp
DRSplatter.esp
DeadlyReflex 6 - Combat Moves.esp

It's a Deadly reflex 6 thing. I think having to do with dismemberments or something.

Any way to combat that, or am I just S.O.L.?
If I am, I wouldn't mind getting rid of deadly reflex at all.

It was a packaging error for Deadly Reflex 6 - have a look at the thread for instructions on fixing it.

Only found people mentioning it, not actually providing a solution. A quick google suggested replacing the mesh, but that seemed to cause more problems.
DR6 is kinda annoying, and I don't really want to take the time to learn all of that stuff. I'm just going to delete it.

Thanks for the help though.

You didn't read close enough, see the second post under Unintentional Nudity Meshes. But yeah DR6 is rather rough around the edges and not really recommended for those who aren't ready to figure out how to get it working right and putting up with the bugs. Try DR5 if you wish, the last stable version.