its weird but usually i don't have to say anything, guys kinda find out before they even touched me....
one guy in my class liked to poke the girls all the time. i saw that and couldn't help but be extra careful around him, always watching his movements, covering my sides when his hands got near them....he knew, oh how he knew....the look he gave me when he understood why i was so nervous whenever he got near me was priceless, no words needed to be spoken^^ and i tried so hard to make it look casual...
but here is my way of telling someone without telling: talking about massages and not really telling why i can't stand them. i've never met anyone who didn't knew why i might hate massages ;D