There are some differences in the male and female BO, but not much. As a FtM you may have to be more clean because of the presence of a vagina. There may be still a slight discharge coming out of that you may not be aware of. I am sweating profusely in any kind of heat, something I didn't usually do too much. My case it is the spiro. My underarms are fine, the antiperspirant is working, the driest part of the body. I have to peel off my shirts this summer, soaking wet with salt marks! Both of us has to stay clean more, even though we are moving in opposite directions!
Joelene