"And then, the 12 year old boy sensually slipped down his boxer shorts to reveal a 17" rock hard penis. He could already spew gallons of semen at his age, and even though this was his very first time doing anything sexual, he asked me to lick his hairy ass, tie him to the bed, and pour hot candle wax on his muscular chest!"
Hehehe, okaaaaaay...so that's not the most realistic sex scene in the world, now is it? Nor is the old, "I saw this strange boy on the street, asked if I could f**K him, and he said yes...I've been having sex with my friends for years!" scenario. Naturally, when it comes to writing erotica, some kind of payoff isn't only expected, it's almost demanded in some cases. But how do you make that payoff 'believable'? How do you keep a reader locked into the idea that this kind of thing could really happen?
What really loses you when you read a story where the sex just doesn't appeal to you? Where it seems fake, forced, or exaggerated? Let us know! We were all teenagers once, some of us still are, and we know what sounds believable and what doesn't. So what totally throws you out of a story's plot credibility when it comes to sex?