diff --git a/combat.js b/combat.js
index 6f07ad9..d85f17f 100644
--- a/combat.js
+++ b/combat.js
@@ -99,7 +99,29 @@ function grappleDevour(attacker) {
     }, requirements: [
       function(attacker, defender) { return isNormal(attacker) && isGrappled(defender); }
     ], conditions: [
-      function(prefs, player=false) { return player || prefs.player.prey }
+      function(prefs, player=false) { return player || prefs.player.prey; }
+    ]
+  };
+}
+
+function grappleAnalVore(attacker) {
+  return {
+    name: "Anal Vore",
+    desc: "Try to shove your opponent up your ass.",
+    attack: function(defender) {
+      let success = Math.random() < 0.25 + (1 - defender.health / defender.maxHealth) * 0.75;
+      if (success) {
+        attacker.butt.feed(defender);
+        defender.grappled = false;
+        changeMode("explore");
+        return "You shove the " + defender.description() + " between your cheeks. Their head slips into your ass with a wet <i>shlk</i>, and the rest of their body follows suit. You moan and gasp, working them deeper and deeper...";
+      } else {
+        return "Your grasp and shove the " + defender.description() + ", but they manage to avoid becoming " + attacker.species + " chow.";
+      }
+    }, requirements: [
+      function(attacker, defender) { return isNormal(attacker) && isGrappled(defender); }
+    ], conditions: [
+      function(prefs, player=false) { return player || prefs.player.prey; }
     ]
   };
 }
diff --git a/feast.js b/feast.js
index eabfed2..728d7c5 100644
--- a/feast.js
+++ b/feast.js
@@ -172,6 +172,7 @@ function advanceTime(amount) {
   time = (time + amount) % 86400;
   player.health = Math.min(amount * player.maxHealth / 86400 * 12 + player.health, player.maxHealth);
   update(player.stomach.digest(amount));
+  update(player.butt.digest(amount));
 }
 
 function renderTime(time) {
diff --git a/vore.js b/vore.js
index 9c437b8..b203afb 100644
--- a/vore.js
+++ b/vore.js
@@ -24,7 +24,7 @@ function Player(name = "Player") {
   Creature.call(this, name);
 
   this.fullness = function() {
-    return this.stomach.fullness();
+    return this.stomach.fullness() + this.butt.fullness();
   };
 
   this.attacks.push(new punchAttack(this));
@@ -32,6 +32,7 @@ function Player(name = "Player") {
 
   this.attacks.push(new grapple(this));
   this.attacks.push(new grappleDevour(this));
+  this.attacks.push(new grappleAnalVore(this));
   this.attacks.push(new grappleRelease(this));
 
   this.attacks.push(new grappledStruggle(this));