According to Wikipedia, rape occurs in English law when "a man penetrates another person with his penis without the consent of the person being penetrated" but any sexual act that does not include a penis is not classified as rape.
This is very counter-intuitive to me, especially since this definition seems to care more about perpetrator's body than about the victim's body (the classification changes if penis is replaced by any other object but does not change according to the orifice being penetrated). The Wikipedia page linked above also mentions the crime of "assault by penetration", which apparenty carries the same maximal penalty as rape but I wasn't able to find any data about minimal or average penalty, or about wider consequences of being charged with either crime (such as being barred from certain jobs or having to disclose one's criminal history in some contexts).
I'm trying to wrap my head around this situation. Do I correctly understand that technically a person cannot be convicted of rape in England and Wales for a sexual assault that did not include their penis? Is "assault by penetration" the same as "rape" for all practical purposes and it's just a surprising naming convention, or is there genuine differece? I'd also love to learn if this naming convention lead to any issues (e.g. rape victims objecting to not having their assaulters charged with rape, etc.).