Thanks, I'd never heard that word before.
So is frottage gravely immoral? On a moral scale from -10 to +10 is it tied with anal intercourse or does it score a bit higher?
So is frottage gravely immoral? Not if it's done correctly.
Seriously, I have enough problems running my own life without having to worry much about what others take part in, as long as no one is harmed and the acts are consensual.