I am an ectomorph. I am 6'0'' tall, but I only weight 115 lbs. I'm a freak. I don't think being skinny alone makes someone shy, but that plus a low self-esteem can, like my situation. You see, there are plenty of really, really skinny people who are totally not shy, but then there are those like me, who are skinny and shy, because we have no confidence in ourselves. Contributing factors to having a low self-esteem because of shyness can be things like being bullied, teased, and made fun of as a younger child. I remember everyone making fun of me when I was in elementary school because of how skinny I was. For some reason, back then, I didn't even think of myself as being skinny. Maybe I wasn't. Maybe I was only slightly skinny, but because of everyone calling me skinny throughout my younger childhood, it caused me to percieve my own self as being skinny as I grew older, thus causing me to create some sort of self-fulfilling prophecy in which I became skinny. You know, it's one thing when people want to make fun of me for being skinny in elementary school, but when I got into middle school and high school, and peers became less childish (not necessarily less mature, as there are obviously a lot of immature people in schools these days), their remarks merged from being a put-down/tease, into rather offensive comments like, "You need to get some meat on them bones"; of which I found to be extremely hurtful, even if their intentions were not cruel. I guess some people say those things to make themselves feel better about themselves, you know, the really arrogant people with perfect bodies who need to constantly reassure themselves of how perfect they are by saying things like that. Other examples of that were, "Do you ever eat?", "You really need to eat more"; or let's say, I'm eating dinner at a friend's house (obviously an extremely rare occasion for me being a near-antisocial) with their family, then someone would say, "Jesus, you look like you could eat a horse", or, "Jesus, does your family ever feed you?"
There is so much more I would like to say about my skinniness, but I don't think anyone wants to read a super-long post. I guess I'll stop here, but there's one more thing I want to say, and that is; why do these people care if I'm skinny? I'm the one who has to worry about it. It's my body, not theirs. It's not like I'm anorexic/bulemic. Both of those disorders disgust me (no offense to any one who has performed either of those in their past or is currently having trouble or struggling with either of those disorders currently). I apologize for typing so much. Obvioulsy I never get out.