Perhaps they start a business together in the '2 friends story'. They face many difficulties at the start, like lack of funds and competition. But through their combined efforts and their strong friendship, they manage to succeed in the end.
Another possible plot is that one of the friends gets into some trouble, like getting wrongly accused of a crime. The other friend believes in his innocence wholeheartedly and spends all his time and resources trying to prove his friend's innocence. In the process, they have to deal with a lot of obstacles, including uncooperative witnesses and a tough legal system. But in the end, they are able to clear his name and their friendship becomes even stronger.
One plot could be that the son and his friends are taking the mom to a concert of her favorite band as a special treat.
One possible plot could be that the four friends decide to start a band. They practice hard, face some setbacks like not being able to find a good place to rehearse at first, but then they manage to get a gig and become popular.
One possible plot could be that the friends discover a hidden message near the fountain which leads them on an adventure.
One possible plot could be that there are 14 friends in a group and two of them gradually fall in love over time as they all go through various adventures together.
A possible plot could be that the four friends are in a magical world. They are given a quest to find a hidden treasure. Each of them has a special skill that they need to use to overcome the obstacles in their path. For instance, one is good at solving puzzles, one can communicate with animals, one is strong and can move heavy objects, and one has great intuition. They work together using their skills to find the treasure, and in the process, their friendship becomes unbreakable.
Sure. A possible 'friends wife story' could be that the friend's wife is an amazing cook. One day, when the friend was out of town, she invited the narrator over for dinner because she had made too much food. They had a great time chatting over the delicious meal and the narrator got to know her better as a person, not just as his friend's wife.
One possible theme could be friendship and support. If the story involves taking care of a diaper - wearing friend or helping with diaper - related tasks, it shows how friends can be there for each other in all situations.
Perhaps there's a story of a scout who dreamed of being the best on his team. He trained hard every day but was always overshadowed by a new recruit who seemed to have natural talent. This made the scout feel sad and unappreciated. Or it could be about an engineer who built an elaborate base, only to have it destroyed by the enemy team right before victory was in sight.
One possible plot could be that two people bet on who can have a more exciting date night with their respective partners, and the idea of sex is involved in what makes a date night exciting.
One possible plot could be that a girl's hair gets stuck in a boy's watch while they are sitting close on a bus. This leads to an awkward but also a bit of a funny moment between them.