@ash33 Oh jeez I might have just opened Pandora's Box 😂
So there is a British comedy show called Coupling which ran for 4 series. It was kinda like Friends in some ways but more, well, British, and a bit more risqué at times. It's my favourite comedy series ever and introduced us to the Giggleloop, Sock Gap, Captain Subtext, Unflushables, Porn Buddies the Truth Snake and lots more, usually through one of the characters Jeff who was a sweet but quirky misfit.
The Melty Man is the mythical manifestation of the voice a guy might in his head just before he's about to have sex and is all primed/good to go, a seed of doubt or questioning about something which once planted spirals out of control kicking anxiety in and causing (cough, cough).... "deflation".