Simply because the law of rape refers to penile penetration by the perpetrator on the victim. Women lack penises, and therefore cannot commit the crime.
They can be convicted of assault by penetration, which is penetration of the anus or vagina with a part of the body or something else, and has the same possible sentences as rape.
So realistically, the difference is only semantic. Women can't be convicted of rape, but can serve the same sentence for assault by penetration.
That's fair enough, sort of what I was expecting the general response would be. Seems the wording needs updating IMO. A woman could quite conceivably force a man to penetrate her which is still rape really, but it doesn't fit in with the legislative wording
- GP
There are a lot more statutes that need their wording changed, I imagine something which is effectively semantic is not a priority. I agree that both are rape and don't quite know why Parliament decided to separate the two offences, but it doesn't ultimately affect the sentencing.
Kwerk is being well fed here.
Most gay rape will be done by drugging as they are more likely to be able to defend themselves and thus they probably don't realize or if they do don't report it.

Do the victims just not report them?
I agree entirely. I dont know if the sentences are the same for rape vs sexual assault, but it seems pretty one sided against the man.
2Assault by penetration
(1)A person (A) commits an offence if—
(a)he intentionally penetrates the vagina or anus of another person (B) with a part of his body or anything else,
(b)the penetration is sexual,
(c)B does not consent to the penetration, and
(d)A does not reasonably believe that B consents.
(2)Whether a belief is reasonable is to be determined having regard to all the circumstances, including any steps A has taken to ascertain whether B consents.
(3)Sections 75 and 76 apply to an offence under this section.
(4)A person guilty of an offence under this section is liable, on conviction on indictment, to imprisonment for life.
Most rape victims are in a relationship or have been in a relationship with the rapist - it's only about 4% (US study) which is by strangers.
So most men who are raped are gay men & by gay men (as they would be the partners in the relationship).
the report rates are vastly lower yes, mainly because male victims do not receive the same kind of support as female victims and often get looked down on etc after if they come out about it.
That's fair enough, sort of what I was expecting the general response would be. Seems the wording needs updating IMO. A woman could quite conceivably force a man to penetrate her which is still rape really, but it doesn't fit in with the legislative wording
- GP