I made a married man cum at the beach

I was at the beach by myself really minding my business. The beach was public but still rustic enough with fallen trees and sea oats allowing for a little privacy. I watched a family walk by and didn’t give much thought to it. The husband turned back and struck up a conversation with me about the family being on vacation. I was polite but not offering to extend the conversation. He squatted down near me and asked if he could see my penis. I said no. He tried to get me to show him but I repeated that I wasn’t interested. He pulled the side of his bathing trunks open and showed me that he was hard. I sort of froze, not knowing what was happening. He asked me to touch him. I said no a couple times then finally said okay that i would but only use one finger and just touch him. As soon as I did he gasped and immediately started shooting ropes of cum. I was not attracted to him but oddly turned on by the situation. He stood up and quickly went to catch up to his family. I jerked off. I’ve never had that happen again.