That part stems from treating healthcare professionals as authority figures - a mistake a whole lot of people make in both sexual and non-sexual contexts.

If you think through it, carefully, you should be able to realize that you have a very limited set of obligations vis-a-vis healthcare professionals, such as (drawing on a typical US set-up):

- pay the arranged fee for the services or arrange for the insurance to pay
- arrive on time
- notify of missing appointments 24-48 hours in advance or pay for no-shows

That is all. Also, in your best interest, be honest with the healthcare professionals.

Now, that really is all.

Where does you fear to disclose sexual information to healthcare professionals fit in, then?