The best ladies don't have extras.
They provide a service, the exception is anal, although some ladies include it if they offer it as a service.
The most annoying thing for me as a client is those ladies that have misleading advertisements.
Offering things that they have no intention of doing.
Next to that is paying for 30 minutes and being thrown out after 10.
If you intend offering a good service with plenty of good reviews, just be straight with guys. It's as simple as that.
I would hope that most clients are decent guys, and there are only a small number of idiots, but other ladies would advise you better on that subject.
If you want to start with a safe client, you could pm me and we can discuss.