The article made me think of that time in Fallout 2 where you met a girl (or her brother--and had opportunity for both regardless of the gender of your player) and if you were kind to her, she basically jumped you. Cutscene fast forwards to her father walking in on you, and forcing you to marry the gal/fellow, who then will insist staying loyally by your side through the whole of the game (and she will stay with you to the entire end if you don't let her get killed).
I was a little put off by the fact that I had no choice in reciprocating the girl's advances, but I thought it was a cute scenario. And I loved how your spouse insisted on staying with you through thick and thin (and if you gave her a submachine gun and made sure her AI made her keep her distance, she could even be helpful sometimes in combat). But I was very disappointed that they didn't let your spouse have much dialogue beyond "I wanna stay with you, pookie," and she couldn't even level up or gain skills properly. You could however, if you wanted, sell her into slavery or hire her out to a porn studio. Because, I suppose, that was funny in some sad game developer's mind (and sadly, in the minds of a lot of players). But you couldn't try to have a meaningful relationship, or even turn the character into a deeply contributing party member--because the developers thought that would be boring? There is no love in the Wasteland (why not)? Here was a character they had made sweet and innocent and insistently loyal and then intended her solely to die horribly, be enslaved, or whored out. And to spite them (not that they knew), I protected her to the end, even getting her across that stupid electricity trap grid at the end of the game alive. In my own mind, the girl's loyalty had earned my character's loyalty, and they would live happily ever after. It was a great story. Just a shame it existed in my own mind, and clearly in opposition to the developer's intentions.
(But, for the record, I am absolutely sure the sex between Jinx and Miria was awesome.)
Moral of the story is, even back in 1999 there were opportunities to write both good sex and romance into games--maybe even better opportunities, when developers could fall back on text descriptions more (now EVERYTHING has to be animated and voice acted). But those opportunities, with rare exception, weren't taken. Maybe the problem isn't the immaturity of video game players, but those who make those games.
And the thing is, if you actually want a meaningful story that happens to involve some fun sex, you have to have a person who is both mature and talented enough to write it. Not to mention a publisher willing to give the dev a shot at something like that.
Good luck with that.
On a completely different note, I think game ratings need to be way more prominent on the box and in marketing, with a big giant note on the front saying, "YOU ARE A MORON IF YOU BUY THIS FOR YOUR CHILD, AND WE WILL FIND YOU, TAKE YOUR CHILDREN, AND KEEP YOU FROM SPAWNING EVER AGAIN IF YOU EVEN THINK ABOUT IT."