I've had TONS of tickling strangers experiences. Too many to count. I dunno, I've never gotten a BAD response. I think it depends on how you do it. Most girls understand that if a guy finds out she';s ticklish, she could very easily get tickled a lot. I've tickled underarms, sides (lots), ribs, feet (lots, the most probably), any position or perdicament really. Lots of feet in socks and nylons, as it comes up more often than not. And contrary to what I've heard others say, I find that almost every girl whose feet I've tried to tickle ARE ticklish!