Why would a pure, chaste man want to marry a woman who experienced lewd relations with others?

Because no one that is a virgin turns into an instant sex goddess or porn star. Marrying a virgin is special, and maybe a gift... but you get to spend the next 5 years of your marriage convincing her that oral sex is common, nice girls do swallow, and that anal sex is pleasurable if you take the time. So there are pluses and minuses.... a virgin means practice, practice, practice... so that could be fun!