Same reason that they don't put the new loo roll on the holder .......
&
quote: "why do women always, put the empty sweet wrappers, back in the tin."
They are both in my experience mens habits, just like not putting the toilet seat back down!

Mind you, I would sooner have my man put the wrappers back in the tin than all over the floor as is also very usual!!

Well ---- In previous lives, married to women and with three daughters, also my time spent as a single parent with two of the daughters at home, I cannot recall a single time anyone other than myself has replaced the loo roll
Mind you I did recently have a rude awakening when visiting the loo in the middle of the night only to sit on the hard, cold, and somewhat difficult to perch on rim, when I had left the seat up! TBH I usually put it down as well as close the lid, a habit developed mainly to stop the kids dropping toys down there!!!