Where should the line between sadomasochistc and “conventional” sexual activity be drawn? The English appeal case of R v Slingsby [i] concerned the accidental death of an individual who had consented to an inherently risky sexual act (the insertion of her partner’s fist into her anus) that was considered “vigorous” but not masochistic. As noted above, conventional sexual interaction is just as susceptible to subversion as S&amp;M encounters, and can just as easily collapse into a non-consensual act.  In effect, “normal” sexual expression is as difficult to regulate, and as likely to incorporate violence (or “vigorous activity” as the judge in Slingsby would have it) and to cause harm, as sadomasochism. Society at large does not demand that all private sexual activity is as tightly regulated as professional sport, nor does it attempt to outlaw sexual activity. Instead, it is acknowledged that personal freedom outweighs the occasional harms that private sexual relationships produce. Existing legal safeguards are seen as providing victims of abusive conventional relationships with adequate protection and recompense.  Indeed, the dangers that accompany conventional sex may be less obvious to the participants in a relationship than the dangers posed by a poorly tied knot or an inexpertly wielded crop. Sexually transmitted infections, concealed personality disorders, infidelity or jealous former partners all constitute significant and easily overlooked sources of harm.  [i] R v Slingsby [1995] Crim LR 570