How accurate do you think yaoi sex scenes are?

i mean, looking past obvious cliches and contrived plots just comes with the territory when you're reading yaoi, but as soon as i see someone shove it in without lube/with minimal prep and their partner just...go with it? that shatters all sense of realism. (￣∇￣"). like, even if the guy on the receiving end managed not to pass out from the pain, he'd still be incredibly uncomfortable at the very least, and they'd be taking a trip to the hospital to get his ass fixed at the worst :/