Apparently, it's too warm up there for them to produce sperm – at least, according to heat-based contraception advocates.
Erectile dysfunction is rife, testosterone levels are falling, sperm is weaker than ever and meds are making matters worse.
Now a household name, Fleshlight's best male sex toys and masturbators run the gamut of easy-to-clean, high-tech penis strokers.
They say it's not a sex thing – so what is it?
The hefty phallus is 17 inches long and may be the biggest example from ancient Rome ever discovered.
The grave of 99-year-old Catarina Orduña Pérez is now topped with a huge penis and testicles weighing nearly 600 pounds.
The Turboo is the latest sentient penis sleeve from Tracy’s Dog, and it strokes your rocket at 13,000 rounds per minute.
Artist Indu Harikumar’s latest project, Cock-a-doodle, aims to normalise conversations around the penis, and all kinds of feelings and experiences associated with it.