食色性也

shísèxìngyě
  1. Appetite and lust are only natural (Mencius 6A:4).
  2. By nature we desire food and sex.

CEDICT

To enjoy food and delight in sex is nature.

Wiktionary

Entry Composition

1 食色 shísè
  1. food and sex
  2. appetite and lust
2 性 xìng
  1. nature
  2. character
  3. property
  4. quality
  5. attribute
  6. sexuality
  7. sex
  8. gender
  9. suffix forming adjective from verb
  10. suffix forming noun from adjective, corresponding to -ness or -ity
  11. essence

classifier: 個
3 也 yě
  1. also; too; as well; (not ...) either
  2. (used after a verbal or nominal expression X to indicate that X is an extreme or unexpected case) even (X)
  3. (literary) particle having functions similar to 啊 a