"Sometimes" he killed for pleasure. This passage, the only one I recall like this, doesn't, at least to me, infer that this was a common practice. In fact, as I read it, I see it as another way in which ERB is comparing humans as a race with the perceived nobility he sees in the savage beasts. ERB recognizes this as a "man-like" aberration in the behaviors of Tarzan, because of his heritage. As I read these passages this is my interpretation of ERB's prose. He is describing man in general, much more than Tarzan of the Apes, in this passage. Tarzan, because he is a man, does this on occasion. Because he is also a beast, he feels no remorse. I don't get the impression that this is at all frequent, nor do I recall any passage, in any book, which actually describes such a killing of a beast.
Once he saw what his own species was like, I would have expected him to gain an appreciation of the pleasure of killing, even had he not already experienced it. From the time he first encounters man, he begins to learn that killing for pleasure is very human.
Tarak, who sometimes posts just for pleasureubj