I am searching for a retro/vintage porn

It was a retro erotic film. Not sure but i think it was American film. A young girl goes for walk in village alike place and encounter an ice cream truck. Ice cream man understands girl is young and naive then after a few small talk, he tricks her into giving blowjob. After blowjob ice cream man runs away. Young girl doesnt understand what they did. Next a hooker appears and tell girl to its their place so she cant sexually service there. Sorry for little info.