Toss clothes to the floor

It’s the first Wednesday of the month again, time for a post for the Insecure Writer’s Support Group.
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This month, I’ll forgo the optional question and instead ask a question of my own. It has been bugging me for a while. You see, I like reading romance novels. In many of them, both historical or contemporary, when the characters are involved in a sex scene, they often throw their clothing to the floor. I wonder why?
In all my life, I’ve never tossed my clothing to the floor. I think it is unsanitary. I understand that the romance heroes, while in the throes of passion, are in the middle of an erotic interlude, their desire rages, their lust is unbridled, yada, yada, yada, but…
Isn’t there a chair in their bedroom? A drawer? A hook on the door? Maybe even a chest in a historical romance. Why can’t they hurl their clothes to any surface but the floor? They just stumbled in from the outside, their shoes are dirty, and they smudge the street dirt all over the floor while engaged in a torrid kiss. Why don’t the drop their clothes on a side table instead of underfoot?
Is it common not only in romance novels but in real life as well? I’ve never done it – I have a special chair beside my bed – but does anyone fling their clothes to the floor when they undress for bed? Or is such weird behavior reserved exclusively for smutty encounters?
It is an insignificant detail, I know, but please, indulge my curiosity. Tell me in the comments.