My understanding is there's 2 big changes. The biggest concern of HPV previously was cervix cancer, but as women are pretty standardly immunized against HPV it's almost disappeared, but for men it's relatively new (well like a decade, but it's still not pushed like it is on young women) to be immunized against HPV as part of standard care so it's no longer an issue of immunize to prevent cervix cancer but immunize to prevent throat cancer. I'm in my mid thirties and asked my pharmacist about it, I can get the shot but my insurance says I'm to old so I have to pay out of pocket for it.

Also, yes, sex practices have changed widely in regard to oral sex, many men considered it to be emasculating to go down on a woman and sex was pretty much just PIV until the man finishes and then done.