My brother was watching me when I was laying out tanning, it makes me want to cover up. Why is that?

Well that depends on how old your brother is. If he is young then maybe he is just curious if he's old enough to know what's going on then I would be creeping out. And you have every right to cover up.

My brother was watching me when I was laying out tanning, it makes me want to cover up. Why is that?
Because you are embarrassed by your body.
Reply:I've felt the same way before with my cousin actually! I think it feels awkward, because he's your brother for God's sake and that it's just plain weird to have your brother checking you out!
Reply:why is it that he was watching you or that you wanted to cover up? if someone were watching me in a way that was uncomfortable, i'd cover up too. the fact that he was watching you is disturbing. are you sure that's what he was doing? could he have been waiting for the right moment to hit you with some cold water maybe? brothers are like that sometimes.
Reply:because you shouldn't wear a bikini. it's not modest. plus you look beautiful and attractive.
Reply:because its weird to have family check you out!
Reply:modesty and morality. a sense of self awareness and a developing sense of right and wrong .
Reply:you need to cover up. he shouldnt be watching you .
Reply:that's creepy....maybe tell your parents. next time he does it yell at him and say do you got a staring problem?!
Reply:because probably you felt uncomfartable for your brother seeing you. Well hope this answers your question, well bye.
Reply:Your self conscious about your body.
Reply:because brothers don't stare at their sister's body, that's why.