Is it normal that i'm obsessed with boobs????

Okay, i know i'm not lesbian or bisexual, it's not that i'm attracted to boobs or girls. Maybe it's that i'm going through 'changes' in my life right now, haha that's really stupid to say. Anyway, i'm a girl, and whenever a girl shows cleavage, i think about how she can make her boobs look bigger; i saw a video online about that, and now i think about it alot :(
What the heck is wrong with me, is it normal? Haha, thanks!! :))