No strings attached--the writer of the ad is looking for a casual sexual relationship without any interest in a dating relationship or commitment.
Androgynous
water sports
In personal ads it means "Friends with Privileges"
transsexual for male
NSW stands for N-new S-south W-wales
NSA = No strings attached AA = African American
'NSA' means "no strings attached" - in other words, a one-time date, rather than an ongoing relationship.
In the personal ads that I have seen, LOS means Lost or Stolen.
Androgynous
For sex :)
Long Term RelationshipLTR in personal ads means long term relationship.
OHAC mean in Relationship
friends with benefits.
Bareback, or no condom
water sports
In Search Of
professional