Nips poking through my shirt?

Before you perverts take a whack at it, I'm a guy. Okay so most of my shirts are very tight because im compliments me best. Sadly i bought a bunch of nice white T shirts (Which is what i wear most the time) and you can see my nips. which annoys the hell out of me. So how do i stop them. that way you see pec and not nip.