Wait, so if you had the girl of your dreams you would try to convince her to let you be with other people as well?

That is not the custom in our country and therefore there would be negative aspects of social inclusion inherent in the adoption of those practices. Also I have never wanted anyone but her, and additionally she would likely want a study of polyandry to be brought forward before we chose polygamy as the best model were we ever to be together, which we won't be. Marriage itself (though I respect it highly) is an iniquitous institution toward women without complex premeditation into the preservation of fairness (as even the pop authors now know). Even if your chosen companion was raised to think "traditionally" that does not make it right to exploit them, and will in an overwhelming majority of cases lead to an increased number of problems and resentment within the development of the relationship.