Ignoring morals and legality for a moment, this sounds logistically infeasible. The reason I brought up the fact that sex is physically exhausting, is sometimes it really is difficult (and painful) to have sex. Life can get in the way. Women have periods. People take vacations and business trips. People get sick. This sounds more straining on a relationship than anything. Does monogamy drop when such things occur? Maybe it could work if both people have low sex drives.
Ignoring morals and legality for a moment, this sounds logistically infeasible. The reason I brought up the fact that sex is physically exhausting, is sometimes it really is difficult (and painful) to have sex. Life can get in the way. Women have periods. People take vacations and business trips. People get sick. This sounds more straining on a relationship than anything. Does monogamy drop when such things occur? Maybe it could work if both people have low sex drives.