In personal ads, "HPTW" typically stands for "happy to play with." It indicates that the person is open to engaging in various activities or experiences with potential partners. The specific context and intended meaning can vary, so it is important to clarify with the person using the term to ensure mutual understanding.
Height Proportionate To Weight
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.
Bareback, or no condom
professional
water sports
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.