This is definitely something I never experienced before HRT.....
There aren't that many men that smell really good but when they do, at least for me, it's a combination of appropriately applied cologne and their natural odor...
The first time this happened, I had been on HRT for about a year; I was asked to help a guy lift something that involved getting rather close. He had been working and it was July... the sweat was pouring down his face outside in 90 degrees. His scent made me feel, "melty" (for lack of a better term.) Gods, he smelled good! It's like I had this primal urge to be closer to him. Funny thing is that he instantly became the focus of my attraction. Even for months after I would find an excuse to get closer to him and his scent would bring that melty feeling back. He resigned last year and I still think about him sometimes..... Gotta have something to do with how we used to find mates.