In comic con panel 2011, johnny ব্যক্ত that his first screen চুম্বন was with mayin...

Back in the 90's Mayim was on a প্রদর্শনী called Blossom. Johnny guest starred on an episode of the প্রদর্শনী as a guy she kisses at a party.

Here's a video if আপনি want to see it. The চুম্বন happens around 1:40 but if আপনি want to see the lead up to the চুম্বন that's around :48.