Guys, Why does he give her head and not me?

My boyfriend and I broke up after 4 years. We got into a huge fight and we both started talking to other people. He started seeing his child’s mother again and after getting back together I found out he gave her head. He used to give me head in the beginning of our relationship and he stopped after the 2nd or 3 rd time. We’ve been back together for about a year now and he still hasn’t given me head. I brought it up to him out of anger and he never said anything. I can’t get over it. We have two kids together now and everything actually has been very good. But I still think about this and can’t stop thinking about it. Why did he give her head and still won’t give me head
Guys, Why does he give her head and not me?
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