When a woman is on her period, what is her responsibility to still please her man?

I think we should look to our marriage vows to discover what each partners responsibilities are. When we marry we promise to honor our partner with our bodies so, where possible, that is what we should be doing. In sickness and in health also applies of course, we should continue to love and take care of our husband even when feeling sick but If we are feeling really terrible, husbands should be understanding and not be too demanding until we're feeling better. They made that vow too.