Fitness Advice
I have been working out for 3 years now and recently I've been progressing fast since I started counting my calories and gaining weight (I am eating in a calorie surplus because I am underweight). Most girls just want a toned body and big busts but I'd really hate that. My goal is to build big muscles. I've seen some content on social media talking about how chest workouts can help make the breasts look bigger because of the muscles underneath and a lot of the comments mentioned that their cup size increased. Since then I've been scared to lift heavier and progress my chest workout because I really hate my chest, they are small but I really don't want them to look bigger. I am really worried about it especially since I am gaining weight, I don't want to gain fat in that area, but I know it's mostly genetics.
What should I do to avoid this? Is it okay to reduce my chest workouts? I have heard that it could be bad for posture if I build my back and ignore my chest but how bad could it really be? I also don't wear a bra at all because my breasts are small enough that I don't need any support and it makes me really uncomfortable and I hate it so wearing a binder isn't an option that I want to go with.
I have asked this before in a fitness subreddit but the answers I got just made me feel really bad, they were all saying that I should be wanting big breasts and there's something wrong with me so I'm hoping I can get some proper advice from here.
TLDR: Need advice on how to gain weight and muscles without increasing chest appearance.