What to do when people want to fool me?

I dont have a tough look, I have a goofy look, im a nice guy but sometimes I feel that people want to fool me . What I can do about that.

Don't get fooled again.

seriously man, I get messed with all the time. But you have to recognize what kind of fooling around there doing. For me its all in good fun, the guys at work mess with me more than a anyone else and I get them back when I can. But everyone likes me at work. If its not in good fun, and there just being mean you have to stand up for yourself. Other wise it will go on for the rest of your life, no lie. They will respect you a lot more