Sex is a conversation between bodies but we often find it difficult to include our voice in the conversation. Most of us aren't mind readers and getting the pleasure you need can turn into a frustrating guessing game for your partner... unless you speak up. But saying "Mmmm I like how you feel but can you use more pressure with your tongue" can be difficult for many to say. It takes a level of assertiveness as well acknowledging that you deserve to ask for the pleasure you want. For those moments when you wish you would say "a little to the left",  building your comfort with being assertive is a great place to start.