John Stamos kissed a guy ... and liked it!

The 48-year-old actor put his lips on auction this weekend at the 23rd Annual GLAAD Media Awards in NYC, where one lucky bidder paid $5,000 for a kiss.

Joining Stamos in the lip-lock auction were "Glee" stars Cory Monteith and Naya Rivera, who also fetched $5,000 for their smooches.

While Naya had an attractive gentleman to kiss and "Smash" star Megan Hilty bid on Cory, Stamos wasn't as lucky -- his bidder was another man!

John seemed thrilled though, telling the guy "I got the better prize. Come to daddy!"