I’m not a forensics expert how should I know? It’s dirty from something but I know it’s not from the driver sticking it up their ass, I’m 87% sure of that. I just happened to know what the controls were for lol

No that’s a Honda LaneSense passenger side camera toggle, shows what’s beside/behind you from the side mirrors perspective. My mom’s HRV has it. It also activates when you turn on the right turn signal. My guess it it’s from turning the headlights on and off with dirty hands, you can see it’s set to OFF now. Don’t know why people don’t just use the auto headlight feature.