What about it? I never suggested that these were measures of what should be acceptable for humans. He asked about why the animals do these things and said he thought it was done primarily in the absence of the opposite sex. I merely responded that this was not the case. I’m not sure what you are responding to but it certainly wasn’t an argument that I actually made.
The sex positive agenda seeks to end ALL moral judgments over ALL sexual pairings regardless of sex, age, relation, marital status, number, or species of partner(s). Talk of “scientific evidence” for a genetic component et al are just blather to make the medicine go down. Ultimately, sex positive advocates don't care “why”, it's just another excuse to make it palatable, ultimately they don't think ANYTHING should be “off limits”.