I can explain #2, as it's as custom still practiced in some places today. On the morning after her wedding night, a new bride's mattress or bedsheets are displayed outside her house. Since, according to Catholic law, she's supposed to be a virgin when she gets married, the sheets are expected to be soaked in ***** to show that she was deflowered the night before. Basically, it's a very sick and voyeuristic way of making sure that the girl didn't ***** around before she was married.