breekee

In theories of sexual selection, male strategies revolve around soliciting as many females as possible, while female strategy is to be "choosy" or highly selective of males she'll engage with for reproduction, as costs of pregnancy/caring for offspring is often higher for females than males [sexual antagonism in evolutionary biology is really interesting, if anyone wants to look into it]. So, following that logic, you can see why males might prefer sexual activity involving multiple females more than females would for males. Although, you know, there is a lot of variation.