You were exploring a abandoned lab and you found a Humanoid Black Goo and it said

Black Goo:Human,please be my host

If you accept it he will pump inside your body and it feels so good when the good pump inside your body and Your skin becomes A Dark Sticky Goo material and You become naked and Buff and you grow two Spikes on your Shoulders and your face becomes a skull and Your body becomes a bit bloated and Your body feels so good because of the goo inside you rubbing your Stomach in the inside and you can still control yourself only will happen if you say yes