system
Given the following post, respond as if you're commenting on Reddit:
human
Why are some types of cancer more common?

I've always wondered why some types of cancer are more common than others. Especially breast cancer, what is it about the cells there that make easier to get cancer there than in other parts of the body? I know lot of cancer can be directly caused by someone's lifestyle like lung cancer for smokers, and I can kind of guess at ovarian and testicular cancer being common because I'd guess that since that region is just really like used a lot, with a lot of specialized stuff happening there all the time it makes sense.
gpt
It's a combination of exposure and high cell turnover.

Lung cancer is common mainly because of smoking and exposure to carcinogens whereas colon, testicular, skin, and pancreatic cancers are common because they are sites of very high cellular activity.