A bloke has claimed wearing a face mask shrunk his penis, police say.
He warned fellow shoppers they should not wear them because of what happened to him.
The man, who has not been named, has since been reported to police, StaffordshireLive reports.
Officers were stunned when they heard his strange reasoning for refusing to wear a face mask in a South Derbyshire store.
A police spokesman said: "Unbelievably, another seasoned shopper was reported to have advised customers not to wear face-coverings because he felt it caused the shrinking of an unmentionable body part."
Officers have listed recent incidents of people refusing to wear masks in shops, saying the man’s excuse it shrunk his manhood was the worst.
They warned the new Indian Delta coronavirus variant means it is more important than ever to keep safe.
One incident saw a middle-aged man say he did not want to wear a face mask because he believed his IQ would reduce.
Police said he continued with his “argumentative and belligerent manner”, which caused “upset”.
Another incident saw an “entitled” old lady push past a shop worker and screech that she’d “been vaccinated and therefore did not need to wear a face covering”.
West Mercia police safer neighbourhood team said: “Please think about others who are yet to receive a vaccine. Your abrasive manner did not go unnoticed."
Finally, police banned a group of construction workers from a rural South Derbyshire village shop for refusing to wear face coverings.
They also flouted the one-in-one-out rule at the shop, police added.
The spokesman said: "Sadly, it has been unsatisfying to note a minority of injudicious persons – those who do not possess medical exemptions or sunflower lanyards – entering premises without face-coverings, with some behaving in an antisocial manner, causing unnecessary alarm and distress to staff and other customers.”
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The force also urged people to consider how “well-refreshed, full-throttle antics” can impact on bar and restaurant staff.
The spokesman added: “Please respect grocery and hospitality workers – and if asked to wear a mask, unless you have an exemption, please put one on, even if you have been vaccinated.
"If you don’t follow rules or involve yourself in the maltreatment of service providers you may be asked by business owners to leave the premises.
“And if you decide to become argumentative and abusive, we may be asked to attend the incident."