>>148941058
> Why? They just are!
Well, I don't know about Spanish, but in Russian gender of a word can be easily derived from the way it sounds, basically. Words that end on a consonant are considered to be firm, therefore they are male. Words that end on a vowel sound soft, therefore they are female. There's also the neutral gender for the words that end on a few "neutral sounding" vowels. It's easy.
I'm sure Spanish must also make at least some sense.