True story, but it left out the part where you sprain your ankle stepping on the 1000 high heel shoes spread out all over the ground in the middle of the night.
The joke is that he (the one with the non heels shoes) only gets to keep their single pair vertically stacked, while she has a fuck ton of pairs of shoes.
It's of course possible and quite likely that that isn't actually what is happening in the image (the vertical shoes could be hers as well, maybe she even lives alone) but it's funny nonetheless.
May just be evidence that one spouse is very good in bed, and the other is very satisfied.
Edit: Never had a fuck so good you would put up with someone's shoe collection? Try to stay open to it. A fuck that good is out there and worth some trade-offs, if it happens into your life.