Guys, what makes an outfit slutty and not sexy?

nollie33
I usually try to add some sex appeal to my outfits, but always in a tasteful way.

For instance, I usually wear short skirts(finger-tip length or mid thigh) but then I pair it with a long sleeved blouse or something that covers my upper half well. If I wear something low cut on top then I will pair it with something very modest on bottom.

I think slutty would be showing boobs AND legs, whereas, "sexy" is one or the other.

But the other day my sister said I looked slutty and I was wearing a denim skirt that was fingertip length and a white crew-neck tee.

I don't think I looked bad but now I'm wondering...what do you consider the difference between sexy and slutty?
Guys, what makes an outfit slutty and not sexy?
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