I'd go with R-Rated or possibly G. X-Rated would pretty much be like masturbation
Would you rather listen to Klingon opera for 5 minutes of NuUhura moan for one hour?
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)