What's with the inconsistency with some men and communication?

I'm not saying this is all men because it's not. But my bestie is going through with her guy where he will call and text her some days and some days he won't.

My guy friend is like this as well. He was doing so good with calling and texting me everyday until recently and it's just frustrating.

Women love consistency. Why do some men do this?

I don't get it.
What's with the inconsistency with some men and communication?
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