Here's a custom trait for you Renose. I have a character (or two) that will likely use it:
Seductive (2 XP) – Maybe it’s your personality or maybe it’s your attire. Intentional or not, you know how to act and what to say to get the opposite sex following you like lost puppies. +3 to Negotiation and Performance Rolls towards members of the opposite sex. Requires: Charisma 5 or Comeliness
It's similar to a Comeliness, but for 1 less XP it only affects the opposite gender (at a slightly increased rate) and doesn't increase Reputation. The prototype was just +2 to the rolls, but for 1 XP more you might as well nab the Reputation point as well as have an effect on all instead of just a certain gender.
I'm also pondering on a trait about Cannibalism (I'm intending for a rather evil character to have it), but most prototypes I make are too wordy.
The most obvious use is that you can eat the same or similar species for food. However, people are big and a stomach is quite small, so you might also have an option of making Travel Rations out of your prey~ It'll probably be viewed as a crime against nature, though, so if there are witnesses they might get a huge negotiation or reputation penalty. Not to mention that the idea of a person eating another is terrifying as who knows if the eater looks at people as comrades or walking food. Perhaps that could have an effect in battle, like terrorizing the enemy by finishing one off with a nasty bite. But that might be pushing the utility of the trait a bit too much...