It turns out that in Western countries border guards also take bribes in kind, too, which the Russian girl had known for a long time, since she was quietly smuggling some forbidden packages and was ready to pay whatever she could for it and even with pleasure, especially when she gave a blow job...
Well I do not know about the undeveloped ass, in my opinion a man very intensely and without preparation fucks a lady in the ass, and she gets a lot of pleasure out of it! So I think the ass is quite well developed.