Actually I think this is a terrible fucking thread and if the genders were swapped around there'd be uproar!
I have a fairly outgoing personality, quite gregarious, love laughing and making people laugh. I touch folks arms, sit next to them, basically I'm a people person with people I get on with.
Other people, or if I'm feeling quieter, I'm standoffish, quiet, don't engage so much, less likely to initiate or continue conversation. I always say I can't be that energetic and sociable 24/7, so occasionally I recharge my people batteries.
Im in a happy 10 year relationship and if we applied the 'rules' you talk about, apparently I've been leading on mybiss, my milk man, my father in law, my OH best mate, my brother in law, my child's teachers, the chap from tesco, the old lady I met in a field... The list goes on....
And you know what, even if you still class that as flirting (my OH defo doesn't as he's with me for a lot of those interactions!) is certainly not 'leading someone on.
I could run up and down the tesco aisle naked shouting "I love big butt's and beards" and that is still not leading someone on.
A definition of leading someone on is' lead someone on) to encourage someone to do something or to expect something, especially by lying to them or promising them something that they cannot have' (Macmillan). He's done nothing of the sort