
If he is a lower ranking male then putting him near another male witha bitch is certainly oen way to confirm to him that he hasn't mating rights.
How old is he? Hs he ever been scolded for mounting behavior other than by bithes? How hands on are you being with the visiting bitches? Has he had the chance just to be with the bitch and feel at ease with Her?
A male I bred I tried with my own very forceful bitch when he was 4 and she three years old. He woudl not attempt to mount if I was anywhere near, and unfortuantely she wasn't easy as seh wouldn't stand still and we ended up with her putlling away at the crucial moment so the dog tied hmself outside the bitch.
On the next season eh just gave up on ehr!
At age 6 he was presented witha very willing maiden bitch but woudl not perform in front of an audience and an I let them alone watching out of the kitchen window. In the end theymanaged all by themselves the moment I wasn't watching :D
After that he mated her several times growing in confidence.
he has since mated another four bitches, soem difficult with no problem and does not mind being assisted.
A dog often has to learn to be a stud if he hasn't the opportunity at a young age where often eagerness overcomes anxiety
Sadly soem very good males in my breed never became stud dogs as by the time they were given the oportunity they just didn't get the knack or couldn't be bothered.
I treid twice witha lovely champion male who lives with another male. His idea of mating was to hop on and off as if he were playign games with his friend. We did manage matings with both girls but I suspect by the tiem he did manage there was no lead left in his pencil :D
He had only managed to sire a small litter more by luck than judgement before I treid him with my two who both went on to have litters next time with other males.
My advice with this male would be to get him a nice flirty expereinced bitch (not one that will jsut stand there, but not a silly maiden either), have her stay with him from quite early in her receptive stage and be discret about overseeeing them. Let them be together all the time while you can supervise ony splitting them up if you can't. Wehn they finally coem to mate do not ruch in until you are sure that the deed has ben acomplished when you can quietly come forward to steady them and help the male turn if need be.
You need to be very relaxed so he doesn't pick up on yoru anxiety.