We're in middle school. Ok, so our class was in the library to purchase some books before it was book fair day. Then, while I was walking to go sit down and all of a sudden I felt hands on my waist tickling me and I found out that it was guy friend and I had screamed really loud because it tickled then he started laughing because of my scream and asked me why I screamed. I'm not making this a big deal I just want to know. So, what does it mean when a guy sneaks up behind you and tickles you? If my age says 18 to 20 then I'm sorry because when I joined I had accidentally clicked 18 to 20 instead of Under 18 and I couldn't change it back.