LaJan,
You obviously haven't picked up that death and murder are not at all the same thing. Murder implies that someone has carried out a brutal attack on a victim, but death can occur without any such thing happening, and in the case of consensual participation in a scenario that results in death, there does not have to be another participant at all. However suicide does not describe it accurately either, since the participant may simply have a different priority, namely her own sexual gratification. I think that explains sufficiently well why my interest is very different from what anyone would justifiably describe as murder.