Mmmh, I'll go with
Banquet Of Sadism; I only have confused memories of my one and only playthrough, but after hours and hours of gameplay (didn't understood how to upgrade some stuff, so I farmed a lot and did it in one long Sunday up to 2 AM ), I felt... changed. Tainted. I looked down at my once proud flesh rod, as an exhausted priest looks at a corpse after an exorcism, the last sip of vile mucus dripping from a gutted onahole. Was my sex drive taking me too far? Would I ever be capable to feel any sense of belonging to the human race?
As a penance, I didn't ate meat for a week.
Edit: link