One theme could be empathy. When the husband becomes the wife, he gets to experience what she goes through daily, which helps him understand her better. This can strengthen their relationship as he now has a more empathetic view towards her.
One possible theme could be love and sacrifice. The healthy spouse might sacrifice their time, energy, and resources to take care of the one with heart block.
If we assume it's a story about relationships, possible themes could be power dynamics within a marriage. Since the idea of 'pegging' implies a certain role - reversal or non - traditional dynamic, it could also touch on themes of equality and respect in a relationship.
It could be a love story about how they first met. For example, she might recall the moment she saw him across the room and how her heart skipped a beat.
One possible theme could be self - discovery. The pettie wife is on a journey to understand a new aspect of herself that she wasn't aware of before.
Gender roles and expectations are also a major theme. By having the sissy husband become a 'wife', the stories question the traditional ideas of what it means to be a man or a woman in a relationship. It shows that roles can be fluid and that there are many ways to contribute to a relationship regardless of gender.
One reason could be a change in lifestyle. For example, if she has a new job that is more sedentary and she doesn't have as much time to exercise. Another reason might be emotional eating. Maybe she went through a tough time like the loss of a loved one or a difficult period at work and turned to food for comfort.
One possible effect is a change in the husband's self - expression. He may become more open with his emotions, like sharing his feelings more freely instead of bottling them up. For example, if he used to hide his sadness or fear, he might now be more likely to talk about it. Another effect could be on his relationships. He may have deeper friendships as he can now connect on a more emotional level with others.
A wife might edge her husband in a more psychological way. Say, she drops hints throughout the day about a special evening together. She might send flirty texts or leave little love notes. By the time they are together at night, she slowly builds up the mood. She starts with soft touches and sweet words, getting him excited, but then she takes breaks in between, leaving him eager for more. This kind of edging can strengthen the emotional and physical connection between them.
One reason could be lack of emotional connection. If the husband is not providing enough emotional support, the wife might be drawn to someone else. For example, if he is always dismissive of her feelings.
Jealousy could be one reason. Maybe the wife is jealous of her husband's success in a certain area or the attention he gets from others, so she tries to humiliate him to make herself feel better.