Crack your back OR have lots of sex?

During the final years of wife 1.0 there was no sex worth mentioning, and plenty of cracking my back on various rollers to relieve pain.

I have now observed (from many trips overseas to visit my wife 2.0 who is waiting for her visa to come through) that my back is perfectly fine while I'm with her, and we have sex several times per day, but the back returns to its dysfunctional normal about 4-5 days after the last sexy time.

All that hip thrusting must release other things too, like my back.

Anyone else made these observations?
 
When I am done pounding my wife for an hour or more. I have enormous ass cheek pumps, actually it flares my sciatica sometimes.

My wife is a greedy woman.
 
My lower back gives me issues if I sit too long or really whenever Im non active for any amount of time. I'd thought it had went away because it hadn't flared up in a year or two but noticed it again when I was sick recently.
 
Seriously though, anyone with similar experiences?

Only negative is that after too much of sexercise I've managed to get raw spots on my shins. Especially my left. Happened several times. Too much friction against the bed sheets. At least the back feels great!
 
Same as above, hurts when sitting on high school bleachers and similar shitty seating situations.
I'm about to wax this beezy laying next to me, I'll report back on how my back feels afterwards...
 
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