Most women's existences are subsidised by men and/or the state (of which men are the major contributors to in tax terms).

If all men are really getting out of it is sex and companionship, a logical conclusion would be to pay for it as and when it is desired, like a "pay as you go" set up, rather than the "contract" situation (with no fixed terms or costs) as is the case now.

Men's productivity and wealth would accumulate in to their own hands for keeps, instead of greasing the economic and government wheels.