I taught high school students and the there are many vocal young men who can't relate "tastefull" and sex, except, of course, in ways that you do not usually want discussed in a classroom that does not have to do with health or Mr. Clinton...

Love them dearly - kept me on my toes and we had many lively convesations - some of which were like riding a bucking bronco. I'd start that discussion in a heartbeat because it would most certainly be one of interest to them. Given that sort of "anticipatory set" I'd bet they'd learn everything there was to know about shanties and sailors!