Well, as you know, they say to discourage that behavior, but I'm not one to buy into the common advice that everyone 'parrots' mainly because they're simply repeating what they've heard over and over. Since Sydney is so very much like our Huey, I'll relay what has happened for us.
Huey came to us heavily medicated, which kept him dopey most of the time. When I tried weaning him cold turkey he would butcher his feet. So we tried weaning him very very slowly, several times. Three drops, to two drops, then one drop. As he came off his meds, he really took a liking to my wife ( I'm now referred to as second husband). She pets him like you're not supposed to do which makes him get down and do the dirty on her arm. He's also tried mounting GreycieMae but can't figure out how (we're working on it ❤️ ). Wife debated, should she stop doing this? She still does it but limited. Huey eventually stopped on his own and he also weaned off his meds without butchering his feet. We're over two months now. It boiled down to the fact he had raging hormones. Without his little outlet, he had to stay heavily medicated. So next year around January, I'm going to be on high alert for his symptomatic psychosis (which is why they put him on Haliperidol). Apparently Huey was just wanting some loving, awfully bad. I'm also going to setup some solid perches in the aviary, he could never get a good balance on top of a GreyicMae swinging in the breeze on their rope perch.
So I guess what I'm saying is, I'd probably entertain the amorousness if it was leading to being able to handle them. It's really brought our Huey out of his shell. But I usually run afowl of the status quo...