Can be performed on oneself, male to female, female to male, male to male, or female to female.
Can be performed anywhere where there are other people who are uninvolved: parks, restaurants, bars, classrooms, offices, cars, tents, hotel rooms, buses, etc.
Should not be attempted without reconnaissance, planning, coordination, cooperation, control, and skill. Performer and receiver (if present) should practice among friends before moving into a law-enforced public setting.
"I gave her a stealth-job at the movie last night. We almost had to abort mission because she kept moaning."
"Yeah, Mrs. Dunford never saw a thing."