I came home at 3am..

So I came home at 3am last night. My fiancé gets off work at 11pm, so I wasn’t there when he returned. I didn’t get to talk to him until this morning, but he knows when I came in and didn’t even say anything about it. He didn’t ask where I was, who I was with or nothing.. this is like the second time I went out spur of the moment without mentioning my plans to him in the 2 years we’ve lived together. Now that I think about it, he didn’t say anything then either. Idk, I know that he trusts me, but why not ask about my night? I’m 23 and he’s 40, could it just be his age?? Is this just a normal thing, because if he were to do the same I feel like I’d questions and stuff