Thank you very much for your answer to my question.
Just thought I should also add what he told me few days ago when we spoke about his playing with his penis, he admitted that he also did this in the living room while we were watching TV and he had a blanket covering him. So no one noticed.
Isn't this an issue that should be addressed if it isn't done only at bedtime? Please kindly advice further on tips to address this without making a mountain out of it. Thank you so much.