This takes me right back to when I went to San Diego Sea World in 5th grade and the sea lion swam up to the viewing wind on his tank and started grinding his sea lion boner on the glass right at face level.
Dunno why, somehow I never expected the walrus to be a member (heh heh) of the well-hung club.
Walruses are pretty big creatures, to be sure, but there are bigger mammals like the moose where the males are relatively tiny in the penis department (compared to their overall body size) or the gorilla (bigger bodies but much smaller dicks than humans).