In regards to you being shy, you have no need to hold back or feel as you are judged. As a provider, you are my client and I am there for your needs. Everything is on the table as a possibility, without judgement. The worst that can happen is a provider says no.
I believe most people are coming with the intention of sexual fulfillment. As long as the request don’t hurt anyone else, there is no harm in asking for what you want.