Answering the question seriously, my partner and I used the LAX SC shower with our then-three-month-old child with no trouble.
And before the kid, we've showered consecutively and asked the staff not to waste time cleaning the shower between us without trouble; I honestly can't recall if we have ever used the same lounge shower at the same time without the kid. If we did, it obviously wasn't particularly memorable.
Showers after overnight long hauls are entirely about removing sweat for me.