Comparing "Spitfire and Messerschmitt" by Gina when she was younger, "Stupid Boy" (several books based on the character's age) by G Younger and Defenseman (several books with numbers in the title) by Cold Creek (possibly Gold Geek?). Adjusted the author's name so they all start with a G.
They all involve sports, baseball for Spitfire... (on her site she strongly indicates using S&M is not an option), American football for Stupid, and Ice Hockey for Defenseman. The first two the hero is in High School, the last he is starting University, but he is Canadian so he is a virgin. How they lose their virginities is one of the sub-themes, and all the young women they visit consists of much of the story. Although Gina is busy posting a revised version from the one on SOL with much less sex.
The last two have the hero getting into modeling. Only Stupid Boy visits the land of Hollywood and film making, but perhaps later books/revisions of the others may encounter that activity. Spitfire and Defenseman lead into CIA and MI6 anti-crime activities by the hero. Defenseman's parents are dead, although his father transferred some of his sports knowledge to the hero before his death. In Spitfire... the father has urged his son, the hero, to engage in athletics and may have assisted his progress. This is not a theme of Stupid Boy, the parents are surprised by their son's interest and success.
I am sure there are other similarities and differences in these well liked stories that Reviewers such as ourselves could comment on. What is memorable to you, as reader/reviewer, about each of these stories?