Should there still be ”Parent TMI” today with late teen and adult children in this day of open sexuality?

I was waiting in a lobby and picked up a popular women’s magazine (no, I can’t remember the exact magazine, vol. and issue number, if you need that Google it yourself), there was an article in there about women who were embarrassed by details revealed by their mothers or said to them. Most of females who’s anecdotal entries were at least 18 year of age and up who stated embarrassment about hearing positions their parents used to try to get pregnant with them, shaving of their ”lady parts”, piercings had or have in same area, or ‘A’ listed stars they would jump the bones of if they had the opportunity and situations were different, etc. In the age of the parent/friend why would it be embarrassing to hear your parents are human; if it were any other women you know, would you be as quick to say “TMI, TMI, I don’t need to hear that!”?