I've had both extremes with the same breed so it's just down to luck really. My former boy never tried to mount me ever and the most he'd do was rest his head on my leg and air hump. From first getting naked to doing stuff with him (handjobs, oral, etc) was around 3 months of build up, and then only if he was in the mood.
My current boy is the total opposite, from being naked to him trying something with me was less than 60 seconds
The first time I got naked in front of him was just to change my clothes and he followed me into the bedroom. As soon as I sat on the bed, he jumped up behind me, wrapped his front legs around my neck and tried to fuck my back...and he came on my fresh t-shirt
There's no way I can handle his knot, but I have got down on all fours for him while wearing some boxers to test the waters, and he mounted me straight away and hit my hole perfectly without me having to show him a thing.