this does not sound right or normal. perhaps there is an injury to spermatic cord. kissing or other endocrine change from emotion has produced, abnormally, pain in testis. I don't know what's wrong, but do believe something is wrong.
sounds like blue balls, just go whack it. lol
This is a strange question; did you orgasm after your kissing sessions? If not, what you might be experiencing is 'blue balls'. It happens to every guy after a heavy, sexually arousing encounter without a 'happy ending'.
kissing someone will no cause testicular pain.
follow up on this with your provider.
grace
I mean two times, during the last 5 months! sorry for the typing mistake