Pure nostalgia. I actually saw some of these films when I was a kid in upstate New York. Of course we found them among a pal's father's "hidden trove." We were overwhelmed by the variations in mood setting and configuration. Oh my. I have sterilized the "un-sterilizable," (sp, if there is such a word.). But the fondest memory was of a pal who bought some stag films from the local police who had seized them in raids. After they had reviewed the evidence they sold the goods to cash customers, one of whom was my pal, a then law student. Today's world of wide open porn is such a bore (though it has its moments) compared to the delicious excitement of furtive sex.