 (P < 0.00). SA: sexual activity. https://doi.org/00.0000/journal.pone.0000000.g000 PPT PowerPoint slide  PowerPoint slide PNG larger image  larger image TIFF original image Download: Figure 0. Differences in energy expenditure between all four sessions of sexual activity in men (black) and women (grey). Values are the mean ± SD. * Significantly different from the first session in 