Generally I like comments

People who are posting saying why A slept with B are not young or silly, it's you. It's called having common sense because in reality it doesn't make sense and makes you a shitty person, if you sleep with your bff's gf/bf then you can kiss your relationship goodbye so confessing is better in comparison. There are plenty of ways to show your crush's gf/bf are unfaithful, its not like you have to sleep with them yourself. People judge harshly because they project themselves and their values into the story unconsciously and ultimately it makes you have a better reading experience as you actually experience emotions other than 'lol sex'. They don't have to be realistic to have the readers sympathise with the characters, if they do then what do you have to say about everything that is fiction :/

So you are judging a non-realistic scenario with realistic terms. Of course it does not make sense in real life, because even in the pretext of yaoi world it is not the action of a logical best friends who tests his buddy girlfriend, but the action of a jealous friend due to an unrequited love. Ok who here from the comments had a similar experience and would like to apply common sense? There are yaois that are totally realistic (and there you have empathy) and there are the fantasy ones where the premise would not stand in real life. The "I stole your girlfriend because I love you " ( I think extremely rare in real life) is a common drama tool of mangakas. So judging it is like that is really unfounded. You remind me a comment on a GoT episode (where the first dragon was killed and turned to ice zombie) and someone write "oh yeah? Where did they find these big-ass chains in the middle of nowhere to pull the dragon from the lake?" Really? We are accepting Dragons, magic, return of the dead, undead magic Lord that commands ice zombies, but materialize a chains, nope, sorry my logic draws the line there.

So you're saying that we should throw logic and common sense out the window when something is fantasy? That doesn't make sense, even if something is fantasy they should still conform to rules so that the whole thing isn't a giant fucking mess - the example you used (I haven't watched it) is a good one, if the one casting magic has a skill set that freezes things then it makes sense but if it doesn't have the power to materialise chains then yes it doesn't make sense. If the main character can do whatever they want in a fantasy world just because of its genre then it wouldn't be a story but a mess. If a story already has a premise of being set in a fantasy world, then you can't be saying shit like, "it's not possible for dragons to exist", "what magic?" because you'll sound like an idiot, people only complain when the creator doesn't conform to its own rules. Now back to the story, it's normal for people to apply common sense to any story - in this case we have two normal humans set in a realistic setting on earth so we'll judge them like normal people and guess what people complain because they do stupid shit that don't make sense. I guess I know what you're trying to say but people can't help applying logic especially when the setting is realistic (not the actions of the characters).