It is a thread where about girls starting soft ( met art , galitsin etc ) and later doing hardcore.

I found it by hazard the other day and I am unable to find it now ...

I found two threads that fit your description.

 Most innocent vs. Most sexually explicit (or otherwise extreme) - PeachyForum

 MET-Art, Hegre, MPL, Galitsin in hardcore action! - PeachyForum