Husband here.
Woman do not dress sexy when they go out for comfort. If they were dressing for comfort, they would be dressing in tracksuit pants, loose tee shirts of low soled shoes. If you see how many woman dress for a quiet night at home, this is how they would dress if comfort was their intention.
My wife points out that there is no way they would wear high heels which accentuate their legs on a quiet night at home, nor would they wear tight, short skirts. If it was a cool night out, they would be more comfortable in a big sloppy, warm jacket, not some tight little top which shows off their trim stomachs and nice boobs.
Woman dress sexy at night to show off their bodies and to feel like a woman, which is why so many woman from al walks of like, social status and local culture wear their high heals, tight pants, short shorts/skirts and tiny tops on nights out where they will be noticed by many people.
Many, or most woman have a natural exhibitionist side which is why they want men (and sometimes woman) to notice their nice figures, toned legs, big boobs etc but due to social taboos, limit what they show to stopping short of showing titts and pussy.
Most woman out their (but not here in NN) would vehemently deny that they want to show off their bodies, or have a natural exhibitionist inclination, but if that was the case, why don't they go out wearing tracksuit pants and comfortable jackets out at night? Many will say they don't want men looking at their bodies, but most would be quietly pleased if men were noticing them in sexy night clothes or bikinis.
So many of these woman would be very derisive of woman who go one step further by letting me see their tits and pussies, which are often only barely hidden under their tight clothes, but really it is only a slight extension of the exhibitionism showed by many normally conservative woman out there.