Aliens abducted him. I know, you think anal probes and inserting tracking devices in obscene places, right? No. Actually they took him to their planet. Did I mention what these aliens looked like? The looked human. Female. They had huge tits, super thin bodies and most of them where blond. They had such long legs! The manufacturer of 'Barbie' met these aliens and fashioned the doll after them, of course.
Anyway, back on the planet, Snorfleblat, or something, thousands of these big-titted women surrounded him. They touched him all over, exploring his body with their hands. They had never seen an Earthling before and they where fascinated. (Don't laugh, this happens all the time) his clothes vanished, maybe these aliens where magical or something, who cares. The point being he was now naked. Oh yeah, the alien women didn't wear clothes so they where already naked. They had no hair below the neck and they where smooth, soft and warm.