Ah, the legendary "Man Bot" - because nothing says ultimate masculinity like cuddling up with a rubber water bag that your girlfriend initially offered! Congratulations on your groundbreaking discovery that heat can actually relieve muscle pain. I'm sure prehistoric hunters would be very proud of your advanced medical technique of "putting a warm thing on a sore spot".
And let's talk about your midnight hot water bottle ballet - are you confusing it with your dearly departed Jack Russell? I can see the dramatic scene now: a grown-up, in the middle of sleep, momentarily convinced that a rubber container is their beloved, deceased dog. Shakespeare couldn't have written such a rich comedy.
The real hero of the story? Your girlfriend, who patiently offered you the hot-water bottle several times before you, in the height of male stubbornness, finally accepted. I bet she's working on a Nobel Prize acceptance speech for "Most Patient Partner Dealing with Masculine Denial of Comfort".
Rename it "Man Bot" all you want - we all know it's just a hot water bottle that finally broke through your resistance. Welcome to the world of sensible pain management, where comfort knows no gender.
That was put far more eloquently than I ever could.