Another aspect could be Penny's family. Fanfiction could explore what happens when Penny's family from Nebraska visits and how the guys interact with them. Maybe there are some comical situations where Penny's parents misunderstand the guys' scientific work, and Penny has to mediate. These stories can be really interesting and family - friendly.
A theme that is often explored is Penny's role in the group dynamic. In some fanfictions, she becomes the mediator when the guys have arguments about scientific theories or comic - book universes. This shows her importance in the group and how she helps keep the peace, without any sexual elements involved.
As far as I can remember, there is no such Penny wedgie incident in The Big Bang Theory. The series was filled with different kinds of comical situations. For example, there were Sheldon's idiosyncrasies, Howard's attempts to pick up women, and Raj's selective mutism. But a wedgie incident for Penny just doesn't seem to be part of the storylines.
Penny's decision to go back to school was also a significant moment. It showed her determination to better herself and grow as a person. Her struggles and successes in her academic journey were quite inspiring and added a new dimension to her character that had nothing to do with sexual content.
There could be a fanfiction where Penny's pregnancy makes Leonard super nervous. He starts freaking out about being a dad and all the responsibilities. Meanwhile, the rest of the gang tries to support them in their own clumsy ways. It's interesting to see how the characters' relationships develop during this big life change.
One interesting story is when they first met through their mutual friends in the group. Penny was initially a bit more outgoing and worldly compared to Bernadette, but they quickly found common ground in their love for their partners and their shared experiences as women in a group dominated by male scientists. For example, they often teamed up to give advice to Sheldon when he was being particularly difficult in his relationships.
Imagine Penny cosplaying as a sexy character from a fantasy world. She might have chosen a costume inspired by an elven princess but with a more modern and alluring twist. Her long blond hair is styled in loose waves, and she has a tiara on her head. As she walks into Sheldon and Leonard's apartment, they are both in awe. She then starts to act out some of the character's mannerisms, like speaking in an elegant accent and making grand gestures. This not only amuses her friends but also makes her the center of attention at the little gathering they have.
A memorable moment was when they both participated in the scavenger hunt. They showed great teamwork and competitiveness, which was really fun to watch. They were able to use their different skills to try and win the hunt.
A lot of fanfiction could explore Penny's emotions during her pregnancy. She might be excited but also a bit scared. In the fanfic, we could see her relying more on Leonard for emotional support. And the gang could throw her a really special baby shower, filled with nerdy and fun elements, like Star Trek - themed baby clothes or a cake shaped like a scientific formula.