This scenario is what excites me about cfnm. Being required to undress, like in a doctor’s office, or hospital, or dressing room or for a bath or even, perhaps punishment. Then, while in that situation, you are seen by someone or others that makes it very embarrassing.
For example, I envision myself at 30 years of age or so, being examined nude for medical reasons and one or more females younger than me have an opportunity to see me nude and under the direction of a female medical person. Or in a hospital bed, nurse giving me a nude sponge bath. While a curtain surrounds the bed, a 19 or 20 year old girl, visiting someone in my room, can see through the curtain. She sees all of me and what the nurse is doing and I know she sees me and she knows that I can see her watching me. There is nothing I can do, just lay there totally exposed.
Sometimes I know the person watching (cousin, worker colleague, neighbor, etc.) and sometimes I don’t. They obviously enjoy watching and looking in my eyes with a smile or smirk and there is a helplessness that I can’t stop what is happening. The helplessness, loss of control and total exposure is what gets me very excited.

very hot Lumpy !