The term came about in the 90s when everything was euphemised and it was rare to kiss, to indicate that a service provider would kiss clients. Now euphemisms are less important and most escorts kiss, so the term has lost most of its meaning. You shouldn't say you offer it if you don't kiss and any punter who says it requires bareback is delusional (like you'd go bareback with every short-term boyfriend!), but in between that it's open to interpretation. Some escorts think the term is stupid, some of us use it because we feel it implies the anti-production-line more than sex service that we offer. It's not really an informative term though, just something to sound nice in your description.