Notes of sweat, urine, cheese and goat were present in samples collected from post-pubescent teens compared to essences of lilac and raspberry from babies. 3 Researchers found that teens emitted two compounds that the younger ones did not because they’d entered puberty. In the teen spirit of science, the team sewed cotton patches into the armpits for 18 tots up to 3 years old and 18 teens, ages 14 to 18 years.