Wiki makes multiple references to begging if weakness and dirty are high enough, what values are we talking about exactly?  Because I've never received that dialogue option.  Is it tied to a trait/skill like prostitution?

its tied to trait specifically wis and depends on weak

you need at least 5 wis to beg but it will just get you beaten unless you have much more somewhere around 15 or 20

Ah!  Thanks, somebody should probably add that to the wiki, cause the implication is that only dirty and weak stats matter.