The punishment for sex outside of marriage is a hefty number of lashes.
Do not–absolutely do not–date a married woman (and some may try to approach you). Saudi Arabia has one of the highest worldwide ratios of twitter and facebook users when compared to population.
Ok, I kid, but Saudi men can get very possessive and jealous.
You will often see the picture of some flower or artsy pic instead on her profile.
Most Saudi girls that travel outside the kingdom are liberal at heart and will not wear the veil, instead choosing trendy designer clothes.
The women, especially, are quite sensitive, almost naive.
I recommend you never try to take advantage of them, as it can backfire and cost you dearly.
This is one of the TV host, but it gives you an idea of what they would wear and their style.