What is a subtle way to turn a guy on?

Answer 1

Poke him in the side playfully

Run your fingers up and down his bare arms, kiss him on the back of the neck, massage his shoulders

Answer 2

To subtly turn a guy on, try maintaining eye contact, lightly touching his arm or shoulder, and smiling coyly. Complimenting him or leaning in closer during conversation can also be effective. Remember that subtlety is key, so be confident and natural in your approach.