I think you may be on to something there. Oftentimes I pose a gender-neutral question, such as, "When do you apply your first spray of the day--before or after breakfast?" The responses in the female forum were more informative and entertaining than I would have thought--certainly the menfolk would have had good responses to this, too.
I've also posted quasi-related fragrance threads in the female forum that were moved by the moderator to "off topic"--and that's okay, but I think they might have been best located in a general fragrance forum.
I don't know if there are some pitfalls to this. Hope others can weigh in with their opinions on this important topic.