shí​sè​xìng​yě

appetite and sex are human nature

  1. food and sex
    (literary) basic human desires; appetite and lust; food and sexual attraction
  2. xìng nounadjective
    nature
    nature; property; quality; the innate characteristics of a person or thing
  3. adjective
    [classical particle]
    (literary) particle used at the end of a sentence to indicate a judgment, explanation, or to strengthen an affirmative or interrogative mood; or used mid-sentence after a word or phrase to indicate a pause or emphasize the topic