Strictest Jain answer: Yes — if the viewing is intentional, it is not considered proper, even if you did not feel sexual desire at that moment.

In the strict Jain code of conduct, especially from the viewpoint of brahmacharya and mental purity, one should avoid deliberately looking at a naked body. Why?

• Outer action matters, not only immediate desire.
• Even without lust, intentional looking can become a cause for subtle attachment, disturbance, or future passion.
• In strict Jain discipline, the goal is not just “not feeling desire now,” but preventing the mind from moving toward desire at all.

Strictest distinction:

• Accidental, unavoidable sight with no attachment and immediate detachment: much less fault.
• Deliberate looking, even without arousal: still दोष / fault in strict observance, because it is not fully in line with restraint.

Most strict practice:

• Turn away immediately
• Do not continue to look
• Keep the mind detached
• Avoid such situations when possible

So, in the strictest Jain sense, intentional viewing is not spiritually clean even without sexual desire.