How to ask him if he doesn't like making out?

I went on 3 dates with this guy, we have kissed but I tried to makeout with him on date 3 and he wouldn't, just kept peck kissing me. It was pretty obvious I was trying to makeout. Why wouldn't he want to? I thought guys love this... how can I politely ask him what happened or if he doesn't like making out?
How to ask him if he doesn't like making out?
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