Apparently, your cycle could boost your man's testosterone levels.

Animal studies found that olfactory cues of ovulation affected male testosterone levels. Studies conducted by researchers from Florida State University found that the same thing happens to male humans.

In the studies, women wore T-shirts during different phases of their menstrual cycles. The men in the studies smelled one of the T-shirts worn by a female or an unworn T-shirt. Saliva samples were collected before and after smelling the T-shirts and measured for testosterone levels.

Men who smelled the T-shirts of ovulating women had higher levels of testosterone than men who smelled a T-shirt worn when the women were not ovulating or a control T-shirt. The scent of T-shirts worn when the women were ovulating was
rated as the most pleasing.