sex

(chiefly with reference to people) sexual activity, including specifically sexual intercourse.
"they enjoyed talking about sex"

ewww sex is nasty

horney

These words mean that the person who is horney is sexually aroused, i.e. they want to have sex with someone. If you say that 'Barbara is horny', it usually means that Barbara wants to go to bed with somebody.

Bidding Horney good-bye, she hurried home for her automobile.