snappity Anyone is already free to ask questions or put limits anywhere they like, but the onus is not on a person to interrogate from an endless list of possible scenarios. It you have reason to believe that it would make a difference (and you know for a fact that trans status is a legit reason for reasons of sexual orientation and truth telling at the least) then the onus is on the party to disclose. Just like with insurance or any other contract that talks about with holding pertinent information. The precedent in law is well established and you aren't going to get it rolled back now.
Yes exactly as AngryAttackKittens says, sexual orientation and the biological sex of the person you are being sexual with is a universally known and cared about thing.
Would be a waste of time to try arguing about this Snappity and makes you look ever more dodgy*. How many ways can you try to make out that it is OK to deceive people? It isn't and never will be.
SarahAr lots of material facts that would influence a decsion DO have to be disclosed. And more could be tested in court. Consent can also be conditional eg the agreement to proceed based on the promise to wear a condom.
The law says that if a person has consented if he/she "agrees by choice, and has the freedom and capacity to make that choice" and that anything that denies or restricts freedom or choice may vitiate consent. Deception of identity is clearly fundamental - so fundamental that it is a given, hardly needing to be defined in law except for the existence of abusive deceivers pushing every boundary going.
I'm all for broadening the scope of informed consent and what may invalidate it.
Eg I think if you are knowingly infertile and you engage in a relationship that includes sex with someone who has made it plain that they want children, then I think you do have a duty to discuss it first. You don't have the right to decide what is important to another person or under what circumstances they should have sex, especially if your agenda is to get your end away. They may say "hey, sure we can look at the options later, carry on and fuck me", but they may also say, "whoa, actually I only want to sleep with people within a relationship that includes kids so let me think about this". Neither reaction is wrong.
If people want to have casual sex or sexual encounters outside a committed relationship or with people they don't know well, then that is fine too, but let's treat it like sport and have everyone play by the same rules and being open and honest.
And have open honesty carry forward to more realtionships. Lauramipsum Promising to marry someone and having sex etc whilst having no intention of marrying them probably be punishable under the law. Why not? It hurts people every bit as much as stealing their money by deception and can be a psychological wound. You would have to prove it though. And it would generally punish more men than women, so of course no one will want to consider it or consider it in the public interest to stop some men being such bastards.
And let's face it, many men who had been deceived by a transwoman would probably not want to go to court because of the the fear of humilation, or suggestions that he wanted it really etc and so I would think it is massively under-reported. In this rare instance it would be easier for women to report this type of sexual crime.