She IS wearing a Bra...just look on her shoulder for the strap. You eyes did not roam far from the target point...hehe. Actually, some females just happen to have God given nipples that are large and erect even through bras. Guess your female is without that physique but mine are still that way.... and I'm far, far from my 20's
That's not a shoulder strap. That's the seam of her T-shirt. And note the inevitable effects of gravity on mass (ahem). She's not wearing anything under that thin shirt.
Aside from the utter tackiness of her appearance, as my OB-GYN says, you shouldn't go braless when you're 20, because the effects start really showing up when you turn 40. Some of my friends who cultivated the "hippie look" in the 70s are paying the price now (thank heavens I listened to my OB-GYN!) This poor girl is already starting to sag a trifle, and she's going to look like a cover girl for National Geographic in another 15 years or so.
/cattiness off