What is your advice to a young man who suffers from urinary incontinence and finds marriage problematic, fearing its effect on the marital relationship and its stability?

Marriage is preferable for those who can afford its expenses and are capable of it, as it is a safeguard for the soul and helps in lowering the gaze. This becomes even more تأكيد (emphasized) for those who fear temptation and have strong desires. The urinary incontinence you suffer from does not prevent marriage, but you should consult a trustworthy doctor to determine its extent and impact on the marital relationship. If it does have an impact, then the fiancée and her family must be informed, along with providing a medical report so they are fully aware of the situation, keeping in mind the Hadith: "Whoever deceives us is not one of us," and "None of you truly believes until he loves for his brother what he loves for himself."