Shovevim Shiur Siman 183:  on Bedika: A woman must go to the mikveh after seeing blood – even after many decades; Does a woman living with a man out of wedlock need to go to the mikveh? When a man is young a woman is forbidden, and when he is old he doesn’t have the drive; laws of a “zava”; Is it “better” for a Jewish man to live with a gentile or a Jew if neither woman will go to the mikveh; If a women is “close” to her period, should a man try to “chap” her before she becomes a nida?