I was trying to find a bigger picture of this but i couldn't find it. I'm fairly well versed in photography, and i zoomed way in on the nude photo, and i can't find any trace of cut and paste, and even the film grain on his cock and his face match up. Available in multiple sizes and formats to fit your needs.
BOBBY SHERMAN NEAR NUDE Michael Parks DARK SHADOWS David Selby THE
I mean, if you look at the size of his bulge in this still from a movie, the size of the bulge in the swimwear, and the size of that cock on display certainly match up