[marktwain]

Some is, but primarily it appears to be predation and territorial defense/protection.

From my reading, it is a mix of all of the above, with predation tops, then some benefit from females coming into estrus, and territorial mixed in.

Trying to get into a bears' minds to sort it all out is beyond human research.

[Travis McGee]

Trying to get into a bears’ minds to sort it all out is beyond human research.

I think it boils down to 2 things in the boar’s mind, as stated just above.

1. Get laid
2. Take out future challengers