On: New male contraceptive may be submitted for Indian approval this year

[nommm-nommm]

To minimize the risk of failure. Same reason why you'd have a backup parachute when you jump out of a plane even though you strictly only need one.

[manmal → nommm-nommm]

Sure, I get that. Grandparent mentioned fairness as driving factor though.

[Ericson2314 → manmal]

Ah yes should not have forgotten redundancy being good. Fairness is obvious: cost of procedures, risk of side effects, time spent in operation, etc is born by both parties.