The most important thing to know about these tattoos is that the after-care is more personalized , depending on your breast shape and size. "If someone with larger breasts gets [an under-boob tattoo], they can use Tegaderm during the healing process," explains Mariah, referring to the transparent film dressing some pros prefer for protecting fresh tattoo ink. This will decidedly solve the problem of boob sweat or friction from skin and clothing. And as far as bras go, Mariah confirms it's all relative: "If a bra is going to rub against the tattoo, skip it." Bottom line: Chat with your artist about your concerns before you take the plunge on the tattoo because no matter what, you'll have to find a design and after-care routine that makes sense for you.