I have to strongly disagree and side with @L_Mariachi.
Sex is not special merely because of its cultural appraisal as being such. Sex is intrinsically special because even as a non-reproductive act it is a crucible for emotional connections welded by the oxytocin that surges through us during the act.
Forcing oneself on someone through this same means is an affront to our very biological basis for one of the deepest forms of social connection. It is a betrayal on the limbic level and thus a violation far more destructive to the victim’s emotional well-being than a mere blow to the head or gunshot to the chest.
