Here's some advice for those seeking to look less curvy -more manly, inverted-triangle shape as opposed to guitar-shaped--
I can tell you this with 100% assurance, since currently I'm struggling to get the feminine shape many of you guys hate to have, and I still have the manly shape you guys long for. I ALREADY DEVELOPED HIPS, I MEAN HIP WIDTH, WHICH IS EXTREMELY DIFFICULT TO ACCOMPLISH FOR AN MTF SUCH AS MYSELF, yet my shape is still more masculine than feminine. WHY?
My shoulder and back width. I'm telling you, if you want to look like men, forget "losing your curves" and focus on broadening your back and shoulders!
I'm sure my hips do compete with or even surpass many of yours guys, yet I just can't accomplish looking like a guitar, because of my shoulder and back width. I totally HATE looking at so many GGs --and even a few transwomen as well-- who have ridiculously narrow shoulders and LOOK VERY curvy --even though they have much smaller hips than me-- because their hips look broader than their shoulders and back. As I've mentioned in previous posts, I developed wide back/shoulders by doing lots and lots of chins and pull-downs. You don't even need to develop your shoulder muscles themselves --i never did myself!--; by just broadening your shoulders through back-widening exercises, you will look way more masculine than a guy with small hips and narrow shoulders and back. It took me years to do broaden my back and shoulders and I looked extremely manly, because that's what I wanted to look like at that time, and I thoroughly regret having done that today, because once you broaden those areas, they stay like that for good!
As a secondary thing, very developed oblique muscles help your waist look less curvy, so if you want to look more blocky and less curvy in your waist, then you should do side-bends, with enough weight to do sets of 8-12 reps. Use dumbbells preferrably. Here's an interesting version of the exercise:
Sit-ups on an inclined table, bending to a side as you go up, (right elbow touches your left knee/thigh and vice-versa-- also help.
Today my measurements are 38-30.5-41 AND I STILL DON'T HAVE A FEMININE SHAPE, because of my broad shoulders and back, which make my hip width look almost non-existent --I'm hardly an A-cup, in case you wondered why I don't look curvy with a 3-inch difference between bust and hips--. I think my hips would need to be around 45 inches for me to start looking guitar-shaped as I dream of being!
Here's a wardrobe tip as well: Wear light colors for the areas you want to make look big and dark colors for the areas you want to be less noticeable. Here's the extreme example: White for above your waist and black for below it. When I wear light-blue jeans I look curvier than when I wear black jeans, because my legs, hips and butt look bigger in lighter colors.
Hope this helped!
Bibi