It's better to search reviews and read them in order to find someone who provides what you want. This requires VIP in order to read full reviews and check the reviewers' history for credibility. Providers expect new customers to learn about their services this way instead of asking them directly, which could get them in trouble. Once your session is underway, you can and should safely ask for anything.

Things that are legal and not often mentioned in reviews, such as wardrobe requests, are fine to mention before meeting. However, asking about anything sexual or suggestive will likely cause a provider to cut off all communication with you.

It appears you haven't yet followed the suggestion to read the Self-Help Manual and recent posts before participating here. Doing so will answer most questions you might have, including this one.