Nipples don’t have muscle inside them — the erection of the nipple happens because of tiny smooth muscle fibers in the areola that contract in response to cold, touch, or sexual arousal. nudes
leaf: originates from the Proto-Germanic word *lauba (leaves), maybe from Proto-Indo-European *leub(h), meaning "to peel off/ to strip". Man, these puns just write themselves, don't they
Selfies may increase social sensitivity.
One study found that taking and sharing selfies was associated with a higher level of social sensitivity, meaning people become more attuned to social cues (like how others perceive them)
The vaginal canal has a collapsed, folded structure (rugae) that expands when aroused or during childbirth. These folds increase elasticity and surface area.
A lion’s roar can be heard up to 5 miles (8 km) away
Their vocal folds are specially structured to create powerful, low-frequency roars with minimal lung pressure.
