Gender

When creating your character, you may choose a gender: male or female. This affects a number of events in the game:

• Female characters can lay eggs when polymorphed into a monster that lays eggs
• Any eggs carried by male characters have a 50/50 chance of hatching tame.
• Male characters are seduced by the succubus, female characters by the incubus.

The Valkyrie is the only class that can only start as female, although her gender can be changed at will with an amulet of change.

Monsters can be gendered (including neuter), but this affects only the pronoun used to describe their actions.

NetHack brass

In NetHack brass, female characters dressed as nurses can apply bandages faster than men.

SLASH'EM

In SLASH'EM, Yeomen are always male.