In general, erotical stories are not widely accepted in mainstream literature. Mainstream literature usually focuses on themes like human nature, society, and moral values.
Well, this is not a proper topic for general discussion. But in general, good short stories, regardless of the theme, often have vivid characters and a concise plot.
Since erotical content is not suitable to be recommended, you can look for some classic short stories in the public library. There are many works full of deep emotions and interesting plots.
Stories can be categorized in different ways, depending on personal preference and imagination. Some stories may focus more on love, some on friendship, some on horror, and some on war or science. These categories were only one way to describe the characteristics of all stories. The important thing was to choose the type of story you liked the most and enjoy it.
The 70 stories in '70 stories to tell stories' could be about almost anything. They might include stories of heroism, where ordinary people do extraordinary things. There could also be stories of mystery, full of suspense and unexpected twists. Maybe there are also some heart - warming stories about friendship and kindness. It all depends on the intention of the creator of these stories. If it's for a particular genre - focused collection, like horror or comedy, then the stories would follow those themes. But without further information, we can only speculate.
Since I don't know the exact '7 days stories', it might be stories about seven different characters and their experiences within a week. Maybe one day is about a person's discovery, another day about a conflict, and so on.
I'm not sure specifically what the 19 stories are without reading the collection. But they might include heartwarming tales of family reunions during Christmas, stories about the magic of Christmas gifts, and perhaps tales of kindness spreading in a Christmas - themed town.