Not every big-boobed girl can suck her own nipples but we recommend they try it. They may like it. The fact, though, is that few girls can do it. Larger sized boobs does not guarantee success. There are girls with big tits who can't bring their nipple to their lips. Most girls who like nipple stimulation use fingers or a sex toy. Very few can suck their own nipples, and even fewer can cum from sucking on their own nipples.