Girls should really know the definition of this term.
The definition of opportunity cost is the cost of an opportunity forgone.
Knowing your opportunity cost would mean knowing your how much you’re worth as a woman.
Let’s assume that a woman’s value (efficiency of economy) is equal to how many men are after her. And her resources would be time and energy (spent on sustaining interest). If the woman neglects opportunity costs and settle hastily for someone with high opportunity costs, such costs will be greater as the woman ages, since resources will become more scarce and her value drops when men lose interest. She will not be operating efficiently as a woman as she is allocating resources efficiently and minimising the more dire cost of scarcity. Resources will also start to deplete and she will experience increasing opportunity costs. Her worth as a woman, sadly, has taken a dip since selecting the wrong production (man) and incurring too much opportunity cost has resulted in loss of resources.
Hence, it is of utmost importance that women take into consideration opportunity costs, as failure to do so will result in misallocation of resources and, scarcity, which women complain of so often (where have all the good men gone to?!). Should a woman decide to settle down, she should select a production that would incur the most minimal opportunity cost, as the theory has so preached, so as to promote efficient allocation of resources.
So what does it mean to incur high opportunity cost?
Simply put, it means choosing a man which will halt men with better potential from going after the woman. Specialising in this production is dangerous since the benefits reaped from such production are not necessarily sufficient for the woman to cover opportunity cost(hence the high opportunity cost). Resources will deplete with time and there will be increasing opportunity cost. Eventually, production will also run out and become unable to sustain the economy. Such would be a pity for a woman who could have maximised her value and incur lower opportunity cost and be better off.
Just a note, specialisation and trade would NOT be favoured in this case. For obvious reasons.