they are the staple chest movement for my lady. in no way will they make anything sag. they do w/ time and a lower bf % help the consequent added muscle to the upper chest (from the exercise), above the breasts, become more visible. sexy. for a woman to train shoulders, back, arms, legs but not train upper chest is silly.
most of the sagging breast bullshit is likely from someone who doesn't train or know a fucking thing. i will say often as women lose bf the breasts can shrink and thusly look potentially saggy because they're not filled w/ fat anymore. usually though, i've noted from home experience that as a woman gets leaner and the tat ta's get smaller, they actually look younger and perkier, happy. a happy breast is a fun breast.
taking it further...if you ever get to a point where you are rip shit lean most of the year, you can consider fake tits. fake tits that are done well are BEAUTIFUL. that said, i hot woman is a hot woman and big breasts DO NOT MAKE ATTRACTIVE, ATTRACTIVE MAKES ATTRACTIVE. i've heard that subpectoral is the way to go for female implants, i've also heard that doing heavy pressing movements can cause the fakes to, w/ time, shift outward, not fun or good. the most horrible image to me is the crazy juiced up ladies w/ what appears to be tennis balls implanted under their man pecs, one looking far east the other looking far west. scary shit!!
sorry if my biased tone comes through, i'm fine w/ how men look when taking different shit, women "on" shit...well god bless, i'm all for free choice, but it doesn't look right to me. there is a line and everyone has a different sense of what they find attractive. i'm quite sure, well i know, that some men think my girl is too muscular. shit, some woman have said for me - tone it down you're too bulky. for christ fuck, i only weigth 215lbs at nearly six feet tall. to those folks i say, for christ fuck, don't eat that muffin, your ass is already too fat to ever view not wearing those supportive skin hiding pants. you are like walking human veal.