I’ve had a somewhat different experience with my late gelded boy.
He was almost 9 when he was finally gelded, and until that point (since he was a weanling) he lived with several other intact boys. He was the bottom of the totem pole from the moment he was put in with the other boys, right until he was sold and left the barn.
He was snipped about 3 months before he was sold, and immediately moved in with a mare at his new home. He had no interest in her despite her throwing herself at him, haha!
I bought him approximately 6 months after his gelding, and he still has no interest in mares and can safely be turned oit with them, but put him in with another gelding (or a stud) and he will mount them. He has actually managed to “breed” a gypsy stud at a previous barn i had him at…
He is still the clean freak he was when I knew him as a stallion, and he still is one to flehm frequently and puff out his chest to show off his studliness, but only in response to other boys he fancies. Mares can go into heat right in front of him and he doesn’t bat an eye, but god forbid a gelding pees nearby!
-sigh- only I would end up with a gay, late-cut, gelding.