I have well defined and relatively dark lips anyway, lipstick is overkill - my lips are reasonably full too, I feel lipstick overemphasises them.

I'll wear it if a guy likes it - as for taste, I like the taste of most brands, espacially Rimmel - always liked that name - Rimmel.

I do know some women who wear lipstick on their pussy lips for effect - I myself have never tried it...