One of the things that always amazes me about SL is the way one is immersed in the virtual environment. I once had an uncomfortable chair, but lying in a bed in SL, I'd forget about it.
Alas, there's a limit to that. My more comfortable chair gave up the ghost, and I sit at my computer now on a makeshift stool pending finding better seating... and, as the title says, RL wins in the end... so to speak.
I've not been in SL for too long at a time for a couple of days, and that's a big part of it.