There's always been something that has confused me about how eroge and nukige deal with sex scenes.
In nukige, it isn't rare for you to hear the characters say the names of the sexual positions/techniques they engage in. However, you hardly ever see this in eroge, which tends to show what is going on, rather than telling. Also, in such situations, nukige tends to use more informal slang words, while eroge leans towards more sophisticated words. For example, a nukige would use 'blowjob' when an eroge would use 'fellatio'.
For these reasons, it seems like the games that focus more on storyline than ero scenes put more effort into ero scenes than the games centered around ero scenes, while you would think that this would be the other way around. Seriously, most nukige I've read have ero scenes on-par with your typical fanfiction sex scenes, and for those of you who are not familiar with those, most are VERY, VERY bad. Does anyone know why this might be?