Should I suspect something

My husband has always fallen asleep on our couches in the living room cause he says they’re very comfortable. But he’s Been dozing off on them and falling asleep until the very night for the past couple of nights. It all happens on random days. He did it yesterday and is doing it today. I tell him to come to bed and he says he’s super comfortable there. Should I suspect anything happening? Like him texting a girl or something? It’s just weird how he’s been doing it like our bed is right there. Why can’t you just sleep on our bed ?