No, not being harsh (I don't think!).
He's 3.8, and has been dry during the day for over a year, but still has pull ups at night. They're wet in the morning.
We've chatted about this and sometimes he wants to get rid of the night nappies, and says he wants to be a big boy.
The other day, I asked whether he wanted to stop having night nappies when he moved into his new room (he did that last night) but he said no, I'll stop using the nappies when all the wee stops coming. 

Last night, I was reading him a story before putting him to bed, and thought I could smell wee on the nappy I'd just put on him. I asked if he'd done a wee in it, and he said yes he had. I asked why he hadn't gone to the toilet and he shrugged.
So...I think he's weeing in the nappy because he can. And he's lazy!
Should I just try him without? Any tips? (Well, apart from getting a sheet on the bed...!)