Is it normal to walk @ 3 a.m. then want to go naked?

I LOVE to walk especially at 3 in the morning on the weekends but I am a proud nudist I reluctantly put on a minimal amount of clothes just in case ( Cops ) but never any underwear.During my walk my penis gets hard from rubbing against my short shorts this in return gets me horny so I remove my clothes & masturbate after I masturbate I continue my walk stark naked I do this all year round .Is it normal want walk around at 3a.m. and then want to walk around naked ?