You know how whenever something comes towards your eyes you instinctively flinch to protect them and scrunch them up? well I know that I don't do that, I used to but then I just forced myself not to flinch it's a really hard thing to try and not do but now I can actually allow people to touch my eyeballs if they don't back down. It freaks people out and isn't a good idea to start messing with flinch reflexes as they are there to protect you and your body from harm.