- Chosen by Voters The biggest part of research is looking things up yourself and not asking others to do it. HOWEVER, I do want to help because this is an important subject. The function of the breast remains the same inside with or without cancer. The sole purpose of breast is for nursing a baby. Mind you, breast cancer doesn't strike usually until the woman is beyond or during menopause. So she wouldn't be having babies. But there's always that 1% that defies the norm. Not often but it can happen. so for most, they wouldn't be breast feeding. It was just an example any way and not meant that young women in child bearing age will get breast cancer. I just want you to know, the function of the breast remains the same. Men get breast cancer. Not as much as when women do and society associates breast cancer with women because I believe it's only like 4% of men that get breast cancer. As far as the reason, it's no different than that of a women. Men also have milk ducts. It's true. Look it up. They don't have as much estrogen of course which is the hormone responsible for the development and function of breast. That's why their breast are well,,,flat. so to speak. Like men, women also get testosterone. Same theory applies.All cancer start out with a cell gone awry. It begins to mutate, and infect other healthy cells and tissues. They clump up in a mass called the tumor. Why these cells do that and how to stop them is something scientists have been working on for ever. Cancer is not contagious, so that if by some quirk of nature a young mother did get breast cancer, the function remains the same. 99% of the time, women will have the cancer long before they feel a lump. Cancer normally doesn't show symptoms, this is why breast cancer as well as many others are so darn dangerous. It's a sneaky disease and it sucks. I hope this is what you're looking for. I hope your paper is good. Look up more information though and elaborate on the things I said. OK…Good luck. Source(s): Breast cancer survivor 1 year ago 100% 1 Vote