Dhampir, bite, brawler, blood drinker

[Niaden]

Hi, everyone.

I have a char - dhampir-brawler with a alternative racial trait:
Fangs :
On occasion, a dhampir may inherit his father’s lengthy canines. Whenever the dhampir makes a grapple combat maneuver check to damage an opponent, he can choose to bite his opponent, dealing 1d3 points of damage as if using a natural bite attack. As a standard action, the dhampir can bite a creature that is bound, helpless, paralyzed, or similarly unable to defend itself. This racial trait replaces the spell-like ability racial trait.

Please help)

Bite -it's a natural weapon:
"Natural Attacks
Most creatures possess one or more natural attacks (attacks made without a weapon). These attacks fall into one of two categories, primary and secondary attacks. Primary attacks are made using the creature’s full base attack bonus and add the creature’s full Strength bonus on damage rolls. Secondary attacks are made using the creature’s base attack bonus –5 and add only 1/2 the creature’s Strength bonus on damage rolls. If a creature has only one natural attack, it is always made using the creature’s full base attack bonus and adds 1-1/2 times the creature’s Strength bonus on damage rolls. This increase does not apply if the creature has multiple attacks but only takes one. If a creature has only one type of attack, but has multiple attacks per round, that attack is treated as a primary attack, regardless of its type."

However brawler has unarmed strike, so fists are natural weapon too.
Please help. What base attack bonus should i add to Dhampir bite? And what bonus to damage?

Also, it said "Whenever the dhampir makes a grapple combat maneuver check to damage an opponent, he can choose to bite his opponent".
So may i make grapple and bite in the same round? or option of bite is available only on 2d round?

Thank you in advance! yeah, i'm newbie, i know(

[pocsaclypse]

Unarmed strikes are not natural weapons. I'm on mobile so the best I can to is the unarmed strike entry from d20pfsrd for a citation, but to the best of my understanding you don't need to worry about the multiple natural attacks rules.
EDIT: I'm dumb and didn't read through the brawlers unarmed strike section before posting but it seems like it only counts as a natural weapon if there is a spell or special condition that affects natural weapons. I'd argue that using the bite attack isn't affected by the brawlers unarmed strike feature since it isn't one of the stated conditions in which the unarmed strike would count as a natural weapon.

[Ferious Thune]

I have a Dhampir brawler/vigilante I'm working up. My understanding of a dhampir's bite is that it is not a normal natural weapon. I don't think you can attack with it normally. You only get the damage when you maintain a grapple, and it's automatic damage. You're choosing to do the bite damage instead of your unarmed strike damage when you maintain the grapple.

[Niaden]

ok, got it. Thank you, all!

But what about grappling and inflincting the damage while grappling?
"Whenever the dhampir makes a grapple combat maneuver check to damage an opponent, he can choose to bite his opponent".
So may i initiate grapple and bite in the same round? or option of bite is available only on 2d round?

[Alzhan]

NO you can't initiate a grapple and bite in the same round. Unless you have the greater grapple feat, which allows 2 grapple check in one round

[Niaden]

ok. Thank you!