Loaning guns can create problems.
A friend of mine, an old English gentlemen who had been over here in the US working in the aerospace industry since the 1970's, had a passion for first generation Colt single actions. He collected them way before they became popular. He never was much into shooting, just collecting.
I used to loan him a gun whenever he wanted to go shooting. His stuff was too nice to shoot. He got interested in Colt 1911's because of me, he had an AD while practicing mag changes in his house one night and shot his shower pipe.
He recently passed away and left me his collection of Colts. Now I have to decide what to do with over 50 pristine first gen single actions. I wouldn't have had this problem if I hadn't loaned him any guns.