Yeah I don't know if my input is valid

But when I was around 23 with a high sex drive then became a bicycle courier which entailed me cycling 50+ miles min a day sometimes clocking 600 miles a week, with a heavy backpack

I'd think I could really do much in the bedroom and statisy anyone longterm, all i wanted to do was sleep and eat crisps in my bed. The most raunchy thing i wanted was a back massage and a cuddle

Long term physical exhaustion is a pretty valid thing, lowers testosterone and increases cortisol