
1) Erotic books 2) Erotica 3) Music festival in Toronto 4) Private erotic bits 5) Unusual subjects
Found on
https://www.crosswordclues.com/clue/curiosa

Curiosa is the name of a 2004 concert tour in the United States and Toronto, Ontario, Canada, organized by Robert Smith of The Cure. It began with a concert in West Palm Beach, Florida on July 24 and ended in Sacramento, California on August 29. The headlining bands were The Cure, Interpol, The Rapture, and Mogwai. The concert had two stages, with...
Found on
http://en.wikipedia.org/wiki/Curiosa

pornographic books
Found on
http://phrontistery.info/c.html
noun books on strange or unusual subjects (especially erotica)
Found on
https://www.encyclo.co.uk/local/20974

books, pamphlets, etc., dealing with unusual subjects. · (in selling and collecting books) books, pamphlets, etc., containing pornographic literature or art; erotica.
Found on
https://www.infoplease.com/dictionary/curiosa
No exact match found.