The spoilers just make you want to read the manga to try and understand how it can make sense that the president of the United States wants to absorb the corpse of Jesus Christ to make America great again.
Madness string 47903
Some monkeys have a bone in their penis. Humans do not, as far as I know; haven't checked them all. So yes, a skeleton can get a boner, but only if it is a non-human skeleton.