It seems I have broken it somehow. Nothing turns me on. I think I may have desensitized myself or something. If you need to ask questions to help me out, please do.
If there's nothing different in your life recently (medication, illness, stress, etc.), it's likely just a phase, perhaps over-stimulation as you suggest. Go out and do something fun. Or do your laundry. Eventually, the urge will come back on its own.
Even though I'm a guy, I swear I have a period every month. There is one week out of each month where my sex drive just hits zero. Don't know why, can't explain it. It just happens.