At times I've not masturbated often enough and felt desperate, I've gone into a shop, picked out some jeans to try on as an excuse and relieved myself in one of the cubicles for ten minutes on at least four occasions now. No I don't recommend it but the mirror does help add excitement to the experience.
I can be horny if the wind blows in right direction. I have masturbated everywhere in the woods, in public bathroom, while driving, in a restaurant bathroom, in changing room, you name it i have probably orgasmed there.