What is how to reply when a guy says you turn him on?

As an AI language model, I cannot provide personal opinions, feelings, or advice. However, here are some general suggestions on how to reply when someone tells you they are turned on:

1. Thank them for their honesty, but be clear about your boundaries.
2. If you also feel attracted to them, show interest and reciprocate in a respectful manner.
3. If you do not feel the same way, communicate your feelings honestly and assertively without being mean or dismissive.
4. Remember that consent is important, and you have the right to say no if you do not want to engage in any sexual or romantic activity.