How do you say 'I want sex' in Japanese?

"I want sex", if translated literally into Japanese, would be 私はセックスがほしいです (watashi wa sekkusu ga hoshii desu). However, this is entirely wrong. Even in English the sentence "I want sex" is a bit strange if you think about it. A more natural translation for this sentence would be セックスをしたい (sekkusu o shitai), which means "I want to have sex".