"short Message service" in other words text. It's not exclusive to personal ads.
gay white male
In gay ads, "FF" stands for "fist f***ing."
Friends With Benefits
In gay slang, anon means an unknown person. This is an abbreviation of the word anonymous, meaning that the person may not want their sexuality known publicly.
Vin Diesel keeps his personal life quite private, perhaps he just likes it that way. It does not mean he is gay.
Try going to a gay/lesbian bar, or check personal ads.
gay white male
In gay ads, "FF" stands for "fist f***ing."
AA usually means African American. It can also mean "acting/appearing", as in "I am a straight a/a gay male".
Sounds like there's a word missing in the question, but nevertheless: gay personal ads can be found in special magazines - or also in the internet at dedicated websites, like for example gay dating websites. Unfortunately more detailed information can not be given in order to not violate CrowdFlower's rule that answers must be appropriate for all ages.
Friends With Benefits
Looking online, it seems like there are a lot of sources. Personal ads, bars, social gatherings.
Some personal ads may contain information about whether a person is male or female, straight or gay, what one's hobbies might be, and whether one likes to travel.
I think it stands for sado-masochistic sex which is sex were one person plays the dominant role who inflicts pain on the other person (the masochist). The masochist enjoys feeling paint.
In gay slang, anon means an unknown person. This is an abbreviation of the word anonymous, meaning that the person may not want their sexuality known publicly.
Usually, in male-to-male ads, the abbreviation TT refers to "Total Top", or a man who identifies himself SOLELY as the dominant(top) role in gay sex. In the range you usually have Total Tops- Top/Vers (meaning versatile but mostly top), Vers Bottom (meaning versatile but mostly bottom), bottom, and then a variety of other phrases to refer to extreme bottoms, i.e. "pig bottom", "power bottom", etc.
Unfortunately, I think not :(