It would appear that this article could have alot of bearing on the question of women in submarines. I'll let you all read the article, but here's some highlights:
"With the prospect of a very long-term mission, it's hard to ignore the question of sexuality," says Lawrence Palinkas, a medical anthropologist at the University of Southern California in Los Angeles... long-term space missions may be similar to extended periods in the isolated and confined environments of Antarctic research stations. He says crews in those stations often pair up in "bachelor marriages" that last the length of their stay – or less. "If there are instances of sexual conflict or infidelity, that may lead to a breakdown in crew functioning."
Palinkas says such problems may be minimised by training astronauts ahead of time in how to deal with stressful situations or by having them speak with psychologists on the ground in group therapy sessions. "You'd deal with it basically the same way you would with any potential crew tension and conflict," he says.