If you'd like to see them again, though, you might consider spending more of your time pondering that question and less on trying to second-guess the college boys, who likely don't even have a reason for their behavior and are just doing whatever they can manage with their immature social skills and fully-formed, if underinformed, sex drives.
I also feel the need to point out, in defense of submissives everywhere, that being passive should not be equated with being submissive. Passivity is annoying; submission is hot. Since you are not into S-M, you probably want to avoid such terms lest you find yourself in situations that are not at all what you had in mind.
Andrea is home with the kids and going stir-crazy. Write her a letter! Ask her a question! Send her your tedious e-mail forwards! On second thought, don't do that. Just ask her a question.