What does this have to do with push ups? lol
Depressing as it may be for guys who only just realise - the woman's breast which most young people are used to are... well, basically LIES!
Yes, as horrible as the topic is porn has warped the modern male AND female teenage mind to believe that breasts are symmetrical, full bodied and perky/upright, when this simply is
not the case apart from an extremely small minority or [those which people tend to see] - surgically altered.
(Don't be offended by this girls out there who read this) - but lower your expectations lads, cos as soon as you come to terms what real women's breasts are like, the sooner you'll get over that disappointment and start liking them the way they are.

No, honestly this is a modern perception which is of great concern, because girls grow up thinking theirs look weird and guys grow up thinking that their girlfriend has odd breasts/etc. and it's pretty much all the media's fault as well as the big block called lack of communication where anything concerning sex or anatomy is concerned between parents/teachers-children/youngsters etc.