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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
The average office desk has 400 times more bacteria on it than a toilet.
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.