<s>[INST] hi am 21 years old, i used to masturbate frequently until i started to feel weird feeling around my right Or both testicle, whenever a foreplay occurs or anything arousing for a while, my vas deferens (or anything near it) swells and becomes quite painfull and causes discomfort (the left more than the right) is this related to the varicocele? does both affect fertility? should i be worried? [/INST] Dear, We understand your concernsI went through your details. Masturbation do not affect your fertility. But vericocele does affect fertility. You need to consult an urologist to confirm your problem and get treatment for the root cause.If you require more of my help in this aspect, please use this URL.  Make sure that you include every minute detail possible. Hope this answers your query.  Further clarifications are welcome.Good luck. Take care. </s>