"We might even do that to each other, leaving Athelstan to slip into whoever has his hole most readily available," Ragnar suggests.

No, they have never done that with Ragnar at the receiving end. And for all he knows Athelstan's desires and preferences, they likely never will. And yes, it is the one thing deemed most anathema for a Viking man -- to claim that another has allowed it is a matter for libel suits that might even end in holmgang. But still, should Athelstan ever want it or suggest it, Ragnar would open himself without hesitation.