Ruaridh Connellan / Barcroft USA

"It happened to me at the grocery store, and when it was over there were around 150 people looking straight at me. Why would I leave the house when something like this can happen?"

His wife, April, is finding his condition just as difficult to cope with as he is. Decker has a near constant erection but the couple rarely have sex. She told Barcroft: "We really struggle right now as he is unable to work and supply for his family, and I feel like all the strain is on me. It’s really upsetting; we don’t do things that man and wife should do and we argue over things that should not be affecting us.

"Because he sometimes has episodes at night we took the decision to sleep in separate beds. That can be very frustrating. You want the comfort from another person, particularly your husband, but we don’t have that."