How to turn him on intentionally?

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Me and my bf are in relationship for almost 7 months. He is my first and he is 6 years older than me. He talks about how I don’t turn him on intentionally. I feel a little bit sad that I don’t know how to do all that. Anybody has any suggestions? He always said he know that I am new to this and he loves me. He said all other girls they have to learn in order to get there too