Why he didn't kiss me?

I've been talking to this guy for a couple of years, since day 1 he said he wanted to kiss me, but since I just saw him as a friend he never tried anything. (Very patient guy)

Fast forward 2 years and we finally kissed and it was amazing, super hot, super passionate. We went out a few times and always so good. Then we didn't see each other because busy schedules and out of town trips. When we saw each other again he picked me up. We went to have lunch, drove back and nothing... no kiss no hug. He held my hand and keep kissing it but that's it... my hand... not a big deal I just follow his lead and match his energy, didn't try anything either... but first time it happened to me. I thought once you get physical with someone you just continue being physical right? 2 hours after he dropped me off he texted me that he wanted to get together again. But we couldn't, I went out of town... so I know he is interested, I know he is into me... so why not kissing? We are not young... we are experienced adults... why asking me out and not get physical when we have already done it?

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We are both married...
Why he didn't kiss me?
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