Nipple stimulation can activate the same brain area as genital stimulation in some people. Brain scans showed that when nipples are stimulated, the genital sensory cortex can light up.
The Earth has been naturally radioactive since its formation. This natural radioactivity is found in the soil, rocks, air, and food, generating internal heat and contributing to environmental radioactivity.
Peak sexual encounters tend to cluster around night
A classic human behavior study found that, across adults, most sexual encounters occur around bedtime (roughly 11 PM–1 AM) — with a smaller peak after waking up.
