What Things You Should Include
Briefly give a description of yourself – age, appearance relevant details of occupation or social standing if this helps attract responses from the preferred sector. State your preferences – straight, bi, gay and what sexual activity you would like to share. Indicate the region in which you live and the distances you are prepared to travel to meet people. If there are any activities that are particularly preferred or unwelcome say so. Indicate the type of person(s) you wish to get in touch with.
This may not be a comprehensive list of what can be inserted in your ad but it will form a useful basis.