I actually don't know how many bra's of I have.
For my daily drivers, I wear t-shirt bra's I have black, white and beige. I think that about 10 of them. I prefer wearing a push-up bra.
The sexy ones I am not sure about, I wear these when I go out with my boyfriend or just for form of foreplay, these bra's form part of my lingerie collection (I love wearing lingerie) I have a number of Teddies, sexy sleepwear and lacy bra's. My boyfriend loves it when i wear it for him, but sometimes I will wear some of my lingerie under my work clothes to work just for me as no one knows its there.
I am lucky as I work in a clothing store, so I get a nice discount to buy underwear.