Definitely not. A mother should encourage her son to understand his body's natural changes during puberty in a healthy and open way. Hiding such a thing can lead to misunderstandings or even make the son feel ashamed of normal physiological processes. For example, in a proper family environment, the mother could provide educational materials about puberty to her son instead of getting involved in this improper behavior.
It's not acceptable. A mother - son relationship should be based on love, respect and appropriate boundaries. An erection is a normal part of male puberty, but it should be something that the son deals with privately or with the appropriate male figure or medical professional if needed, not something for the mother to be involved in hiding. This situation can lead to confusion and potential harm to the psychological and emotional development of both the mother and the son.
The son may lack proper understanding of his body's functions. This can lead to problems in his future relationships. For instance, if he is too embarrassed to talk about normal sexual health, it can create misunderstandings or insecurities in a romantic relationship. Also, it might make him overly secretive about his own body, which is not healthy for his overall mental and physical well - being.
He could also try to act as normal as possible and hope that his mom doesn't make a big deal out of it. He may mumble something like 'It's just a normal thing' if he has the courage, but this can be really hard for a young boy.
She might also choose to have a very general conversation about growing up and the natural physical changes that occur. For example, she could say something like 'As you grow, your body will go through different things, and it's all normal.' But she should keep it very light and not get into too much detail.
Once, a mom and son went to a store to buy a gift for the son's friend. The son knew exactly what his friend liked, and the mom was so proud of his thoughtfulness. They searched the store together, and when they found the perfect gift, the son was beaming with joy. It was a simple moment, but it showed the strong bond between them.
Maybe the mother has a wrong understanding of parenting. She might think she is protecting her son from embarrassment, but she fails to realize this is an inappropriate area to get involved in.