It certainly gives a unique look but must be a nightmare in a world with other creatures that are built differently. Also they would take up a lot of space if they don't want to squeeze on em by keeping their arms tight to their body. ;3

Yeah, but it's their reality. Since bats from my comic project are bigger, I also had to make the other features big, like the legs, thumbs and also the chest. If real life bats can nurse their young with mammary glands located in that place, I think it's fine