Hi, welcome to HCM.
will not cause any problems for Sexual life. However please ask your urologist
whether it is necessary to find out cause. You need regular follow up. If size of varicocele increases in future then it is a matter to concern. In high grade varicocele infertility
is oneproblem seen in few individual.
Depending on symptoms and investment surgical intervention may needed in future.
Hope I have addressed your query.