Why for the life of me I can’t stay awake when listening to Music?

I really don’t understand how someone can stay all night long listening to music? I read reviewers saying I started listening for hours till 2-3 in the morning. Well, I am 62 yo and as soon as I play music man I feel sleepy. I don’t think that is listening fatigue, it must be the opposite of it. I become so relaxed and my eyes start shutting down lol. Is that normal? Is it my equipments that makes me feel so relaxed or is it my advanced age? Can I do anything different to my system? 
I am not sure if this topic came up before and may sound silly but I thought I ask in case someone else on this forum has the same issue.

My system:

McIntosh c2700

Mcintosh Mc 452

Revivalvaudio Atlante 5

Garlubidor divinity dac

Eversolo T8

cables Audience throughout.

Thanks for sharing your experience and input in advance!