AFAIK Canada doesn't have the offence of rape DadWasHere.
I think that may have been a follow on from the push to have it re-defined as Sexual Assault but am not v. well informed about it so may be wrong about that. There are degrees of sexual assault, the most serious of which would probably correlate with English law's definition of rape but again, I'm not well-informed enough about it to swear to it.
There is some merit in doing things that way as it does take away the cultural emotional baggage of rape - the baggage that says if it has happened to a woman, it must be because of something she did wrong. And also the baggage that says a rapist is a monster unlike other men and therefore that bloke from Accounts who has been accused of it, has obviously been the victim of an hysterical harpy with a penchant for false allegations because they're so common aren't they and the only reason the conviction rate is so low.
But I don't know if Canada has better reporting and/ or conviction figures than anyone else, so the name of the crime may not be a significant issue, I don't know.
What I do think is that there may be a case for having specific gradations of sexual crimes which may not be called rape. Rape is a very emotive word precisely because of its long history of being owned by the perpetrators of it and there is little doubt that 40 or 50 years ago, what this bloke in the OP did wouldn't be considered rape, while nowadays under English law it almost certainly is.
There was a case a few years ago where a woman successfully brought a case against a man in Cyprus who was HIV positive and didn't tell her he was, so he infected her with this life-threatening disease. She didn't prosecute him under a rape law, but under another law which I can't remember the details of now. There's a case that his offence should be a straightforward sexual assault offence (of a certain degree, like the Canadian laws) as it involved getting consent under false pretences.
All those people who are asking "would x be rape" what is your point? Are you wanting to have sexual assault law introduced in order to cover those scenarios? Because your point is right; there are a number of scenarios which are extremely borderline re consent, but current rape law, having been adapted from a perpetrator-inspired earlier version, may not cover those scenarios. Is your argument that we ought to get in there and draw up new sexual offences for the statute books in order to cover those scenarios, or is it just that because the potential perpetrators who originally drew up the laws didn't consider that rape, we all ought to let it go and accept that it's a normal part of sexual relationships and ought not to be covered by the criminal law?