I think the thrust of kdonline's original post was more along the lines of:
1. Do boys know that girls have rules about behavior in letters and out.
2. And if so, why do boys put pressure on girls to engage in behaviors that could get them in trouble in or out of letters.
Please correct me if I am wrong

.
I think we know intellectually that you ladies have rules about drinking in letters, but that is kind of up to you. We also know intellectually that you have rules about behaviors that we may not agree with.
Meaning they might not be in our best self-interest
But when it comes to the party, we just want you to come. We don't care if you wear letters or not. And we want you to be as much fun and available as possible. We want you to drink too much. We want you to do wild things. Its fun. And we figure if you don't want to do something . . you won't.
So we beg, plead, ply you with drinks, and cajole. But ultimately what you do is going to be up to you.
I am sorry I don't have an answer you probably want to hear, but I don't think that we as boys are going to act like your parents, we want to be your friends and lovers.
We just want to have fun together. And in the context of a party a lot of things that seem wierd in print, are . . . well . . . fun.
I hope I answered your question honestly enough.