So I am 17 year's old and yes I am a boy/man how ever you would like to put it. And there is this problem.

When it is hot outside or such my nipples are always puffy and they are pretty much huge, and when the temperatue is cold or I get goosebumps or flick at them they turn small and hard like a normal guy nipples.

Is there some type of thing wrong with my body or what is going on, it would really help if you share some ideas or tips.