I don't think I would give a male to someone on a breeding loan and expect anything out of it. They could breed it to whatever they wish and you would likely never know.

In your case, It may be more beneficial to try working your differences out on a personal level, and then start talking about the snakes. Good luck to you!

I am actually in a "breeding loan" with another member on this forum right now. There is nothing signed, but I consider her a pretty good friend and there is nothing high dollar at risk. I gave her my female and she bred males to her that we agreed to. We also discussed some of the "who gets what" and "what if's" up front. I think we kept it as basic as possible as to avoid any friendship issues.

On a side note...Had there been higher valued animals involved...Signed contracts would definitely be the way to go. other than that...I will not ruin a friendship over a simple pairing. We get what we get and move on.