Troy Bayliss, world superbike champion in 2001, 2006 and 2008. In 2007 he lost a testicle during a race at Donington Park. Brian Foster, American mixed martial artist. John Starks, American basketball player. Paul Wood, English rugby league player who sustained a ruptured testicle during a match and subsequently had it removed. Thurgood Marshall, United States Supreme Court Justice who injured a testicle during a fraternity event in university. Tom Lamping, United Kingdom, injured a testicle during a dog fight gone wrong. Due to cryptorchidism
Mao Zedong, founder of the Peoples Republic of China. Unknown
Possible monorchism of Adolf Hitler
Francisco Franco, caudillo of Spain. Monorchism in nonhuman animals
Although extremely rare, monorchism has been observed to be characteristic of some animal species, notably in beetles. See also
Anorchia
Cryptorchidism
Polyorchidism


== References ==
Nonetheless, the value of distinguishing this type of insomnia from other types is debatable due to the relatively low frequency of SSM being reported.Sleep state misperception can also be further broken down into several types, by patients who:

report short sleep (subjective insomnia complaint without objective findings)or no sleep at all (subjective total insomnia)
report excessive daytime sleepiness (subjective sleepiness complaint without objective findings)
report sleeping too much (subjective hypersomnia without objective findings)

Validity
The validity and reliability of the sleep state misperception as a pertinent medical entity was questioned. A study found poor empirical support for this diagnostic item. Symptoms and diagnosis
This sleep disorder frequently applies when patients report not feeling tired despite their subjective perception of not having slept. Generally, they may describe experiencing several years of no sleep, short sleep, or non-restorative sleep. Otherwise, patients appear healthy, both psychiatrically and medically. (That this condition is often asymptomatic could explain why it is relatively unreported.) However, upon clinical observation, it is found that patients may severely overestimate the time they took to fall asleep—often reporting having slept half the amount of time indicated by polysomnogram or electroencephalography (EEG), which may record normal sleep. Observing such discrepancy between subjective and objective reports, clinicians may conclude that the perception of poor sleep is primarily illusionary. Alternatively, some people may report excessive daytime sleepiness or chronic disabling sleepiness, while no sleep disorder has been found to exist.