What a fun little weapon! ...only problems is that, unless you're a tiefling or some other odd race (i.e., one that's probably not currently PFS legal), there's no way to get an "always there" gore attack. Things like the Animal Mask and Fiend Totem (Lesser) give you horns or tusks, but they kinda just pop out when activated and are otherwise absent. (Half-orcs have "tusks", but the Toothy alternative racial trait gives a bite, not gore, attack.)
So, how long to put them on?