yeah, I agree - I certainly don't want huge ones but sometimes you need a little bit of extra!!
Maybe its a lack of self confidence but I wear one almost every day as I think it makes me look better - I'm a pear-shaped person and by boosting my boobs it helps to make my hips appear more in proportion.
Also, because almost every one in the media is skinny with big boobs, most clothes are designed this way too - you need to wear the right underwear just so some tops/dresses sit right!!
A xXx