[makapuf]

Genders in French words is a fine example of a cryptography-grade random generator.

[GuB-42]

It can funny sometimes. A breast (un sein) and a vagina (un vagin) are both masculine, while a beard (une barbe) is feminine. For the slang terms, a ball (une couille) and a dick (une bite) are also feminine.

Of course, it is not always the opposite, otherwise it wouldn't be random. A penis (un penis) is masculine for instance.

[Muromec]

It's a keyed generator, they just lost that small bag that seeded it