That would be so wonderful to be walking along and see someone like that. If a fellow had the nerve to be naked like that with the possibility of being seen, then I would need to have the nerve to go over to him and IMMEDIATELY get my lips on his penis! I would try to make sure none of his semen was wasted!!!!
I would not be so delicate! I would immediately kneel and lock my lips into pump-mode and grab those beautiful cheeks with both hands till I felt warm, slippery cum hit the back of my tongue.