don't know what to say, mate. i usually just flinch. gotta admit, i exagerate a tad doing so so people get that i'm uncomfortable with the action. others, i just back up a bit or scrunch my nose while lowering my head away from the touch. don't know if this is useful, though. mind you, i'm short, with a face that makes everyone think i'm underage and reactions like ''aw, you're so cute'' when doing these things. so im fully aware that what i do may come as innaproppiate or summat depending on who does it.

maybe tell 'em directly? my friends know i don't like my scalp/hair/neck being touched, so when they pet me to make me feel uncomfortable purposely (joking btw) in front of other people and i react, when this other party asks me why did i do what i did (what a mouthful) i just say "cause i don't like my hair being touched" & that's it. don't bother too much.

so, yeah. hopefully you can take something from this? maybe? don't know ksksks but yeah