More opinions are brought about why Beit Shammai require a dinar for marriage. The gemara moves to explain Beit Hillel’s opinion that she can be married with a pruta. What is the value of that pruta? What if the item is something that fluctuates in value? What if it was worth less but somewhere else could be worth a pruta? What if after the fact there is a question about the marriage and the current value is a pruta but it may have been worth more earlier when the marriage took place? Rav instituted lashes for people who did various things including getting betrothed without prearranging, or in the marketplace and or through having sexual relations. The latter, while permitted by the Torah, was frowned upon by the rabbis.