I have done so quite a bit. My partner gets painful menstrual cramps. A good fucking does wonders to relieve the pain. So we throw a red towel down on the bed, keep it simple (like missionary), and shower afterwards.
If you can ruck through mud, you can fuck through blood. Just lay down a towel and get to fuckin. Trust me boys, it's warm, wet, and slippery. Your dick won't know the difference.
I didn't ask her to do that. I just knew she didn't want to. There were times she blew my cock. But I felt guilty letting her do that when I wasn't going to eat het pussy during her time.
We dont fuck when my wife has her period. But if I'm in the mood for sex she's happy for me to jerk one off in bed next to her. She even caresses my balls and inside thigh tops while I tug off.