No.
My mum was very "modern" for the early/mid 80s.
Her policy was "well what can you do? You can't stop them!" and "I'd rather they were doing it in a safe place than in a car parked in a dogdy area"
I had my own qualms about how fast things were moving...but there didn't seem any back back if even my own mother thought that my being sexually active was no big deal to the point where she abdicated all responsibility.
I think an aditionally issue was that once she removed all and any attempt to provide a boundry in that arena I felt like the basis of the relationship had been redefined. So I started pushing in a wide variety of directions trying to find where my push would meet a solid wall of resistance. The pushing made our relationship very diffiuclt at a time when she could handle a downturn the least and ..she sort of just...gave up.
As an adult I have a far better understanding of what she was going through and how hard I was to handle once Pandora's box was open. At the time I wobbled between thinking she was a pretty cool mum all things considered and plunging into depression becuase ai needed an anchor, a wall of limits to cling to or blame for my own reticence....and On some level I felt she didn't love me enough to fight me to keep said defences in place.
So, for me no. Although I will do my best to review that and try not to make decisions based only on the filter of my own teenage years when I get to that point when DS is asking for the same dispensation.
Just don't know if I can get past my misgivings that it could be a huge mistake and be misinterptreted as being disinterested enough to care or a form of shoving the baby bird put the nest and saying "you want to fly, well fly then, on your own head be it".
I guess any one parental postion on this is going to coloured by their own experiences and the very individual nature of their own growing child's realtionship and maturity level.