The way to find other couples willing to swap their wives was to find a swingers correspondence magazine that displayed personal advertisements of curious couples, or even to place your own advertisement to obtain other couples interested. At that time, having a Polaroid Camera was an essential tool that eased all the hustle the husbands had to go through to place an ad, otherwise, one had to take nude photos of his wife & bring the film to the local drugstore where they received their photos developed, & I know some couples that actually did go through all this hesitation. The process of getting replies for your ad could take 6 to 8 weeks using the system through the publications forwarding services. There were moreover some coded abbreviations in the ads, such as: Fr – French/oral sex, Gr – Greek/anal sex, etc.