I'm not aware of any such stories being popular in mainstream literature as this involves vulgar and inappropriate content that goes against the norms of proper literary works.
Educate people, especially the youth, about the importance of positive values. Let them understand that creating or spreading such stories can have a negative impact on others and the social environment. For example, in schools, teachers can include relevant moral education in the curriculum.
A girl and a guy were neighbors. They used to play together as kids. As they grew up, they remained close friends. They shared their secrets, dreams, and fears with each other. Once, when the girl had a bad day at school because of some mean girls, the guy made her a special playlist of her favorite songs to cheer her up. It was a simple yet very meaningful gesture that showed the depth of their friendship.
In general, ancient literature was a medium to convey values, knowledge, and cultural heritage. It was highly regulated by the social and moral norms of that time. Stories about penis growth in an erotic context would go against those norms. For example, in Greek and Roman literature, which are among the most studied ancient literatures, we have stories of heroes, gods and their deeds, love in a more acceptable and non - explicit way, but not this kind of story.
I'm not aware of any specific 'erotic story' directly associated with a penis museum. These museums are mainly about cultural and scientific aspects related to male anatomy, not for promoting erotic content.
One story could be that in a school play rehearsal, a group of girls found out a guy was extremely ticklish. They decided to play a prank during a break. They gently tickled his feet while he was tied to a chair (as part of the play prop). He was laughing uncontrollably but also enjoying the friendly banter among friends.
One story could be about a theater production where boys are made to play female roles due to a lack of female actors. They have to learn feminine mannerisms, wear dresses, and adopt female voices for the performance. It's a great way for them to understand the female perspective in that context.
One story could be about a guy and a girl who are partners in a science project at school. They start off not getting along but as they work together, they discover they have a lot in common and become good friends.
There was a story where a guy noticed a girl in the workplace was always overworked. So he offered to help her with some of her tasks. They started having lunch together regularly and became good friends. They even started a new project together that was very successful for the company.