friend of mine also mentioned that when she got on HRT, her sense of smell drastically improved, and particularly mentioned men's sweat as a smell that is much more noticeable to her now. It's a side effect of the estrogen, similar thing happens in pregnancy, which just floods you with hormones and leads to things like some people suddenly buying unscented cosmetics.

oh and btw, heads up for the cis people, the difference in body odor between men and women is also hormonal in nature. Trans women on HRT smell exactly like cis women. Taste of body fluids also changes accordingly. unlike our terf friend KPISS here, i'm not into nature's champagne, so i can't speak for the differences in pee aroma, but i would be surprised if there were any beyond the effects of diet, hydration and so on.