Behavior is subjective, not biological. Plus, too much of behavioral studies of any animal has tendency to become anthropomorphic. In other words, we project human traits and cultural concepts upon animal behavior. For instance, a male alpha dog cornholing another dog in display of dominance, that alone subjugated the actions in terms of BDSM fetish. And still others might subjectively describe it as two male dogs having homosexual relations, but don't judge them, love is love. So yeah, behavior is not how we get to biological sex. But, if you want to play into the nonsense, then when a dog spins around chasing his tail, then he is obviously showing that he wants to be identified as a helicopter or a washing machine. 😏