| adult humans kissing nude adult humans by appearance
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| Clothed adult humans nude adult humans by activity
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| Clothed adult humans kissing adult humans by appearance
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| Human stages of development as categorized on Wikimedia Commons
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- Children (birth until 17 years)
- Babies (birth to ~24 months)
- Toddlers (~2 to 4 years)
- Preteens (~10 to 12 years)
- Adolescent children (~13 to 17 years)
- Adults (18 years until death)
- Young adults (~18 to 40 years)
- Middle-aged adults (~40 to 60 years)
- Old adults (~60 years until death)
- Definitions come from, but are slightly modified from, the Physical stages of human life as found at Wikipedia:Human development (biology).
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