>>105649243its actually just age and genetics. there's nothing you can do about it besides surgery. Go on chaturbate and filter for 18 year olds + big boobs tag (they can't lie about age since they need to show photo id) and you'll see a variety of sagginess, but you'll never see big natural perky breasts above 25. If you like big tits you just have to accept that they'll be fake or saggy outside of a bra.
picrel research is entirely inconclusive and anyone who says otherwise is a weirdo