Yeah. Morning wood when it happens when you wake up.
Annoying at any time. Bit like a dog that you never wanted, but needs routine attention. You can ignore it but it'll only come back later. Worst bit is when you really need a pee at the same time.
Though I'm not on any sort of treatment, as such, it happens a lot less in recent years. Perhaps my dog has started to realise that he's not as cute and wanted as he thought.