@Musicalbookworm
By that I mean that it is at least acknowledged to exist (unlike the reverse), and, at least from what I've seen, if you are a woman it happened to, you can generally expect support at least from people in your social circle. None of that is possible for men, who, if victims of this particular crime, are considered basically to be walking punchlines (if even believed to be a victim), or completely ignored (as society does with this issue at large).
And while sexual assault is severely underreported if male-on-female, it is basically never reported if female-on-male, despite this being almost as common.
https://digest.bps.org.uk/2017/07/11/sexual-offending-by-women-is-surprisingly-common-claims-us-study/
Stemple’s team begin by pointing to data from thousands of people collected for the Center For Disease Control’s “National Intimate Partner Violence and Sexual Violence Survey”. In 2011, for example, this survey showed that equal numbers of men and women reported being forced into non-consensual sex (either raped themselves or forced to penetrate someone else). Extrapolated to the US as a whole, this would represent 1.9 million victims among each sex during the preceding 12 months.
There are similar findings for sex of victim in the 2010 survey, the researchers said, and that year, the survey also included detail on the sex of offender. To illustrate the prevalence of female offending, the researchers highlighted the number of men who reported being forced by a woman to penetrate her. The survey estimated that nearly 4.5 million men in the US had at some time in their lives been forced to penetrate another person, and crucially, that in 79.2 per cent of cases the perpetrator forcing the sexual act was a woman.
National surveys by the U.S. Census Bureau are also revealing. A 2012 study asked respondents whether they had ever forced someone to have sex against their will: of those who said they had, 43.6 per cent were female (compared with 56.4 per cent of men).
Stemple’s team also considered data from college samples. Most recently, a 2014 study of 284 men and boys in college found that 43 reported having been sexually coerced, mostly unwanted sexual intercourse, with 95 per cent of the perpetrators reported as being female. An earlier survey obtained anecdotal descriptions of sexual violence from perpetrators. One woman described how she “locked the room door that we were in. I kissed and touched him. I removed his shirt and unzipped his pants. He asked me stop. I didn’t. Then I sat on top of him.”
And despite almost completely ignoring this issue (female-on-male sexual assault), U.S. is still pretty much leading the world here. I live in Central/Eastern Europe, and here it's pretty much complete fantasy as far as everyone is concerned. I was flat out told by police officers that it is impossible and they wouldn't investigate if somebody reported it. Likewise, I know a few guys who women had sex with while they (guys) were sleeping (it was a party) and absolutely nobody in my social circle saw anything wrong with it, treating it as a joke since when they woke up the girls just told them they had sex, and were laughing at how shocked those guys were then. I highly doubt anything else to be the case in rest of non-Western world, as far as societal attitudes go.
So yeah, women don't exactly get "support" when this happens to them, but, at least, it is aknowledged as an existing issue across the world, and, more or less universally, at least somehow fought with. The reverse, not so much.