Could it be that Rye has "potty trained" in an evening? I use the phrase "potty trained" loosely as all I did was sit him on it last night - since then he's used it frequently; even when sitting and cuddling he has got down and gone and stood over the potty when he's needed a wee. He only has a nappy on now because he's on my back in my new daisychain mei tai and he's fast asleep, bless.
I was particularly impressed when he stood over the potty started to wee realised he'd stood too far forward, stopped mid stream and shuffled back again; and then continued to wee again. While I'm excited and so incredibly proud of him I do feel a bit sad that this is yet another milestone marking the increasing end of babyhood and moving him more and more firmly onto "big boy" status.