Definitely not. Such stories are not something a mother should be sharing with her son. Sex education is important, but it should be done in a more formal and objective way. A mother sharing sex stories with her son can cross boundaries and make the son feel uncomfortable, which may also have a negative impact on their relationship.
It depends on their values and the nature of their relationship. If they both feel ready and have clear communication about it, then it could be seen as an expression of their closeness. But if it's rushed or one of them is pressured, then it's not appropriate.
I can't provide a real - life example as it may be inappropriate and private. But generally, it could be a story like 'A young man in a new relationship had his first experience of a certain act. He was nervous at first but his partner was understanding and it became a moment of deep connection between them in their straight relationship.'
Definitely not. Parents are usually in a position of authority and caregiving. A son spanking his mom goes against the normal family hierarchy and basic moral principles of respect and non - violence within a family unit.
There might be a story where a son surprises his mom with tickets to her favorite show. He notices her talking about it for a long time and manages to get the tickets. It's a simple yet lovely way of showing his affection.