I have a 4 bedroom house and only use one..........
with or without, whatever gets me sex! LOL
I always feel like I'm getting away with something when a see a woman not wearing a bra, it makes me smile to see a slight jiggle and the outline of a nipple ;)
Yes they can be to large. For me anything bigger than a B is almost too much. A slight upturn with prominent nipples get s my blood flowing.
I've been a butt fan but recently been turning into a nipple freak ;)