You don't say where you are starting from. Is he a complete stranger or is this a budding romance. Are you really a novice or is this question due to an unusual experience...
Most guys respond to attention. There is nothing better than feeling wanted. Sometimes all it takes is a little flirt. If he is already interested in you and he is a healthy young man, tell him you want to see him aroused and he may be fully aroused before you stop blushing. Most men have a strong inclination to respond to visual cues and become aroused when they see a healthy young woman indicating her acceptance or encouragement. Pictures can be a substitute sometimes. More explicit tips and instructions are available in other forums. If he isn't attracted to you or having a health problem, or old, it will be more difficult.
Most guys respond to attention. There is nothing better than feeling wanted. Sometimes all it takes is a little flirt. If he is already interested in you and he is a healthy young man, tell him you want to see him aroused and he may be fully aroused before you stop blushing. Most men have a strong inclination to respond to visual cues and become aroused when they see a healthy young woman indicating her acceptance or encouragement. Pictures can be a substitute sometimes. More explicit tips and instructions are available in other forums. If he isn't attracted to you or having a health problem, or old, it will be more difficult.