Are they necessary?
Plains, colorful, with laces, sexy, princess one..........
For me it's a kind of fashion. Have to match my clothes........Better come with a set.
Of course, need to be comfortable.
They are so expensive, even more expensive than the outer tops.....
Recently, people are debating bras can't help to maintain the perkiness but the opposite.
Check out this article if you are interested in
http://www.cbsnews.com/8301-204_162-57579077/french-study-suggests-younger-women-should-stop-wearing-bras/
Regardless it's function, I think sometimes bras are not for wearing but taking off ;)