I can’t be prescribed it bc I don’t need it ...
Duuuude, if that were true there'd be no opioid crisis, and most bluepill scrips wouldn't have been written either.
Just tell your doctor the little white lies that get you the little blue pills (though I prefer the little yellow ones for myself - tadalafil).
Doctors are pretty skittish about probing you for lurid details of your sex life, so keep it simple like
"I still get morning wood, sometimes, but lately I can't always keep it up long enough/hard enough to reliably satisfy my woman."
Doc won't need much more than that statement to prescribe.