Tiberius said:Female animals "present" for the males when they are ready to have sex. if the female does this towards a Human, would this not be a "Come on" signal?
Jane Goodall, in one of her books, writes of an incident in which a male chimpanzee was observed to have sex with a female monkey (of a species I don't recall). According to Goodall, the sex was clearly consensual. The female was in estrus and approached the male and presented herself to him in exactly the way she would have presented herself to a male of her own species.