If your "colleague" finds a SAM ISO LTR with a DDF MtF "CD" into B&D, they might want to avoid them at all costs as this single Asian male in search of a long term relationship with a drug and disease free male to female transgendered cross-dresser into bondage and discipline could have a lot of issues. CD usually means "Cross Dresser" or CDS mean "Cross DRESSERS"
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.
professional
water sports
Bareback, or no condom
OHAC mean in Relationship
In Search Of
friends with benefits.
Pay to play
"short Message service" in other words text. It's not exclusive to personal ads.