Guys, a guy said ew to the idea of kissing his girlfriend?

My guy friend mentioned to me that he will be hanging out with his girlfriend soon and I responded with aww y'all going to hug and kiss and his response was ew. Why would he say that? The "ew" wasn't followed up with a lol nothing just ew.

Guys, a guy said ew to the idea of kissing his girlfriend?
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