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Researchers have found that seeing touch (on TV or in films, for example) – particularly social, affective or pet touch – can give us some of the benefits of feeling touch. “This is called ‘vicarious touch’,” says Fotopoulou. “The brain codes multisensory experiences in multiple ways. We can also ‘feel’ the pain and pleasures of others just by ‘seeing’ them,” she says. “This is not a permanent or complete substitute, but a partial one.”

Products such as weighted blankets can help. Smith says that laying one across her chest and shoulders makes her feel “much calmer” – speaking, perhaps, to an instinctive need to stimulate the CTs. Interacting with animals is also settling. “My neighbour’s cat has decided to live with me half the time and having her sat on my chest, purring, is so soothing.”