",one thing puzzles me here.,a woman can not force a male[of whatever age,to have an erection,and to have sex]."

Having worked with at least one male victim of rape I can assure you that what you said is the same bollocks as a man who claimed a woman consented because "She was wet for me" Human sexual organs respond to stimulus and can be prepared whether the victim is a willing participant or not, this often adds to the mental trauma suffered by the victim afterwards espicially if they are brought into contact with ignorant fools.