When Humans become sinful, God clothed the First Husband and Wife in coats of Animal skins.
What God hath clothed let not man unclothe.
We know that this was a Public clothing and not a clothing that remains in intimacy between the Husband and Wife. As the Song of Songs... rather clearly... illustrates. And is obviously implied in many other texts.
As far as being around others, even your family, of differing genders with whom you are not married.
What God hath clothed let not man unclothe.
If you a Christian Woman:
Please don't wear revealing clothes.
Even revealing bathing suits.
This includes overly tight clothing.
It is very hard for me to look a girl in the eyes and keep my focus there, when my peripheral vision sees much cleavage in the very low cut and tight shirt said girl is wearing.
I hate my lust. I hate it bitterly.
Yet, please realize that being forced to communicate respectfully with a lady who doesn't respect herself or me enough to cover her features which are meant for her husband's sight alone... is not pleasant. Understand that you are inviting and participating in lust and shaming yourself.
Yes. If you are dressing immodestly: You are inviting lust and participating in it.
Let me give a practical rule of thumb for modesty in general:
Coats of animal skins cover the torso and the bottom, maybe as far as the knee. But at least to the thigh. Shorts and a high-cut looser-fit tank top is the least that fits with that description.
If it is so tight your figure is obvious: It ain't modest.
If it is so loose or awkward that it is uncomfortable or inconvenient or impractical: It is legalistic.
Bikinis are simply a horrid travesty.
Some very lovely and seemingly Godly women I know insist on wearing low cut... TIGHT clothing and when near water, very small bikinis that cover less skin than my boxers.
Second rule of thumb: If my Boxers cover more skin than your bathing suit... for the sake of all things sacred, buy a dark T-shirt and long shorts. Wear that instead.
The stomach being revealed leads the eyes directly to the low centre of the torso emphasizing the bosom and the lower parts.
The thigh being largely revealed does the same.
Short shorts... well... seriously?
I think I have made myself clear.
I am a sinner. When I sin, please don't help me sin.
When I am fighting my wickedness, please don't take sides with the devil.
Thank you.