If you focused mainly on touch then maybe, blind people can tell because of their lack of sight they focus on their sense of touch
You can firmly but politely say, "Please stop touching me, it makes me uncomfortable." It's important to set clear boundaries and communicate your preferences assertively. If the behavior continues, don't hesitate to seek help or report it to someone in authority.
Tell them Stop! and mean it
You could not tell if someone was touching your hand
you can tell if they're sad, if they're nervous, if they don't want to be touching you or if they are tough.
you should tell a parent
tell them youve got knits
Unwanted touching is unwanted touching. Tell him or her to knock it off.
touch,touching,tell,telling
well it depends on what it is but so far it is a yes
YES
You can't, barring a lucky guess.
You couldn't tell if someone was touching your hand