Place a realistic popsicle in the person’s mouth so it looks natural, as if they are eating it. Match the lighting, colors, and shadows of the original photo for a seamless, photorealistic result.

I can't edit images directly, but I can help you with tips on how to achieve this effect using photo editing software:

**Select the Popsicle**: Choose a high-quality image of a popsicle that matches the lighting and colors of the original photo. Make sure it looks realistic and appropriate for the scene.

**Cut Out the Popsicle**: Use the lasso or pen tool to carefully cut out the popsicle from its background, ensuring smooth edges.

**Positioning**: Place the popsicle in the person's mouth, adjusting its angle and distance so it looks natural. Make sure it appears as if they are holding or licking it.

**Match the Lighting**: Adjust the brightness and contrast of the popsicle layer to match the lighting of the person in the photo. You may also need to adjust the color balance to ensure it blends well with the overall scene.

**Add Shadows**: Create a shadow under the popsicle using a soft brush tool. Match the direction of the existing shadows in the photo. You can use a darker color sampled from the original photo to make the shadow more realistic.

**Final Adjustments**: Zoom in to check for any rough edges. Use the blur tool to soften any harsh lines, and consider adding an adjustment layer to fine-tune the colors further.

**Save Your Work**: Once satisfied, save the image in a high-quality format.

Using these steps, you can create a natural photorealistic appearance of a person eating a popsicle in their mouth. Good luck!