While you were walking throughout the enormous house (which functioned as an underground base for the player) you noticed that most of the female NPCs doors were slammed shut. You didn't think much of it, and went on your way. Eventually, you noticed most of the male NPCs in the main room, some looking outside and others sitting down.

Tyrone (Arms Dealer): "Great.. another Blood Moon.."

Andrew (Guide): "It's better if we stay inside tonight. There are werewolves out during Blood Moons."

Gus (Merchant): "It's probably a bad idea to see the girls tonight.." He muttered.

Nuxtak (Goblin Tinkerer): "Ah, yes. I believe female humans and semi-humans are not so... agreeable during Blood Moons."