In Spain, they wear red boxers or knickers on Christmas.

The Primark store in Bouverie Place shopping centre, Folkestone, where the woman tried on knickers before putting them back on the shelf

'Everyone was staring as she took the knickers off again and obviously didn't like them because she put them back on the shelf.'

'She didn't seem to care who was watching or think about the person who would eventually buy the knickers she'd been trying on.'

Shoppers didn't know where to look when a woman stripped off to try on knickers on the shop floor in the middle of a Primark.

Standing in the middle of the shop floor, she took a pair of knickers from the display, stripped off her own tights and pants and put them on.

'I'd hate to get home with a new pair of knickers and find another woman had put them on and taken them off again, and they hadn't been washed.'

Ms Davidson, 33, who lives in the Kent town, said 'How disgusting to think someone is going to take home knickers that another person has been wearing and they haven't been cleaned.'