diff --git a/GainStation13/code/mechanics/fatrousal.dm b/GainStation13/code/mechanics/fatrousal.dm
new file mode 100644
index 00000000..0466ac39
--- /dev/null
+++ b/GainStation13/code/mechanics/fatrousal.dm
@@ -0,0 +1,30 @@
+/datum/quirk/fatrousal
+	name = "Adiposexual Response"
+	desc = "Your adipose tissue develops and shrinks depending on your arousal."
+	value = 0 //ERP quirk
+	gain_text = "<span class='notice'>Your body feels like it could grow at any moment.</span>"
+	lose_text = "<span class='notice'>The feeling of impending growth is gone...</span>"
+	category = CATEGORY_SEXUAL
+	mob_trait = TRAIT_FATROUSAL
+
+/datum/quirk/fatrousal/add()
+	if(iscarbon(quirk_holder))
+		var/mob/living/carbon/C = quirk_holder
+		C.hider_add(src)
+
+/datum/quirk/fatrousal/remove()
+	if(iscarbon(quirk_holder))
+		var/mob/living/carbon/C = quirk_holder
+		C.hider_remove(src)
+
+/datum/quirk/fatrousal/proc/fat_hide(var/mob/living/carbon/user)
+	if(iscarbon(quirk_holder))
+		var/mob/living/carbon/C = quirk_holder
+		return C.getArousalLoss()*35
+	return 0
+
+///mob/living/adjustArousalLoss(amount, updating_arousal=1)
+//	if(HAS_TRAIT(src, TRAIT_FATROUSAL))
+//		amount = amount * 0.2
+//	..()
+//
diff --git a/code/__DEFINES/traits.dm b/code/__DEFINES/traits.dm
index f2c4d5dc..ee902c1a 100644
--- a/code/__DEFINES/traits.dm
+++ b/code/__DEFINES/traits.dm
@@ -206,6 +206,7 @@
 #define TRAIT_WEB_WEAVER		"web_weaving"
 #define TRAIT_METAL_CRUNCHER 	"metal_cruncher"
 #define TRAIT_WATER_SPONGE 		"water_sponge"
+#define TRAIT_FATROUSAL         "fatrousal"
 
 //Hyper
 #define TRAIT_MACROPHILE		"macrophile" //likes the big
diff --git a/tgstation.dme b/tgstation.dme
index 6e295aaf..a618bcb1 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -3098,6 +3098,7 @@
 #include "GainStation13\code\machinery\feeding_tube.dm"
 #include "GainStation13\code\machinery\supply_teleporter.dm"
 #include "GainStation13\code\mechanics\fatness.dm"
+#include "GainStation13\code\mechanics\fatrousal.dm"
 #include "GainStation13\code\mechanics\fattening_trap.dm"
 #include "GainStation13\code\mechanics\helplessness.dm"
 #include "GainStation13\code\mechanics\infestation.dm"