The dildo parade .always one size bigger

I ordered these great dildos and haven't tested them yet. The object here in his bondage bag is allowed to hold out my ass today so that I can sink them little by little ... What do you think ? do they fit ? We'll see ... I'll start with a small dildo and increase ... At some point I have to tie my object's balls because the bigger the dildos get, the more difficult it becomes for him and he crawls forward ... Now he can't get away and I can stuff his ass nice and hard...