OK you think 38-34-42 looks feminine.
Back when my core training was climbing and distance running my vitals were around 34-27-36 at most. I was younger so had very little body hair, head hair to around half way down my back, and short stubble beard.
The number of times I had men walking past me, looking back dissapointed when I was in shorts and shoes led me to ask a friend what the deal was.
He asked what I would think of as a shapely rear view on a woman, I told him and he nodded knowingly, and told me the running had given me the shapely legs and butt, climbing had lent me a taperred back and genetics meant I had a virtually non-existance waist. That along with long flowing hair, and no top, meant many men thought they were going to be in for a treat, and the stuble beard gave away that they had got it wrong.
Despite protesting that I didn't look like a woman, until my legs developed more hair, I kept disappointing men. A few years later I hit the gym hard and now look far less ladylike.
As Goldie says, core is good, deadlifts and squats will give you a solid trunk too.
If you want less to think you look like a woman, dont pad your bra as much.