I'm looking for this strange vintage movie

hello friend I am looking for a porn movie that I saw as a teenager, I had an aesthetic as of the seventies or eighties. I started with a somewhat bald man who went to his neighbor's house to ask for something and he ended up doing oral sex, he lived with a man who projected movies of a helmet that he had, there was also a scene where he had sex with his wife and the bed was completely moved and I do not remember anymore, I know it is rare but I have searched all my life, do you know what it is? or someone in the community knows?