Much like female erectile response and contrary to popular opinion, male erectile response is involuntary,<21><22> meaning that a man need not consent mentally or physically for his penis to become erect and be placed in a woman's vagina. Penetration of a man by a woman is possible through use of a strap-on or other object. Rape of a man by a woman could also occur when limited sexual activities are agreed upon and a man's penis is placed in a woman in violation of the limits that had been set. Rape of a man by a woman is thus possible in several ways.
However, male victims of sexual abuse by females<23> often face social, political, and legal double standards.<24> While gender-neutral laws have combated the older perception that rape never occurs to men,<25> and other laws have eliminated the term altogether,<26> the double standards still remain. Due to these reasons, it is likely being substantially under-reported, with the probable cause being the double standard, or possibly shame.<27>
Ever hear of "morning wood"? Completely involuntary erectile response.