A trick used by boudoir photographers who want them to stand out is to stroke them with a makeup brush.
why, ? x)make up???
mmk why do you want your nipples hard?? but you cant force it or it wont happenceleb make-up
just for curiosity;;why would yew want this?How to make nipple piercings painless?
u could put ice on themHow to make cheekbones?
Why???How can I make my nipples come out?