Asking the same question twice isn’t annoying if you really listened the first time and still didn’t get it.

People stay confused because they would rather look like they followed than admit they are lost. A second question after real attention is entirely different from one asked after drifting off, and whoever is answering can tell which they are getting. Genuine effort followed by honest confusion is easy to respect. The pretending is what wears people out.

Say what you did understand before you ask again, since that shows you were with them and narrows what needs repeating. Then name the exact place you lost it. Almost nobody minds explaining twice to someone who was clearly trying.