It's unreasonable to avoid a woman when she's menstruating.
John and his currently menstruating wife are both home for the evening.
John wants to watch TV.
John makes his wife a treat and invites her to join him in the living room for their favorite TV show.
John sees that his wife is already watching TV in the living room, so he goes to the watch the basement TV instead.
John's wife feels comforted and cared for by her husband which strengthens their relationship further.
John's wife notices John's choice and their relationship grows more distant.