I'm attracted to young, healthy, fertile females who are interested in having offsprings.
Our paleo ancestors were most likely polygamous and pro-making-and-raising children. The ones who did not like making and raising kids in the past were not our ancestors... their blood line died out.
Yes, I am sure polygamy has been practiced; both polygyny (1 man, many females) and polyandry (1 female, many males). However, when species become less sexually dimorphic, (ie. male and females are closer in size) monogamy is the general trend, and this is the case for humans. When the female gets larger, it goes to polyandry. With polygyny, the male has no concern for raising offspring whatsoever, generally speaking.
What stands out in my mind is that human sperm has adapted to fight foreign sperm if a second copulation occurs. Thus, females with multiple sex partners must figure into our distant past to an extent. Of course, with war killing off the males, polygyny would be the best outcome for surviving females.