Bruises after sex?

Sarah

So we had a rough night of sex, but as far as I know he wasn't near my knee or legs at all. The morning after sex I found this bruises and I have no idea where they came from. With the flash you can't see them a lot but with no flash you see a bit more. I didn't shave there either, didn't hit myself... I don't know what happened. They also don't hurt