In this episode Walden tells Alan that it's his choice to remove his beard not Zoey's. Alan replies,"Oh yeah and when I was married to Judith, it was my choice to get a vasectomy not hers." How could Alan have had a vasectomy when he was married to Judith? If he did, he'd know that there'd be no chance for him to be the father of Judith's daughter, Millie, yet he believes he is. And just before Kandi divorced him, they were about to try to conceive a child.
That vasectomy line, should never have been written.
I will say this, Walden looks better without the beard. Ashton Kutcher is not someone that beards are meant for. He's more of a clean shaven type. A lot of people agree with me about that. Also without his long hair and beard, he actually looks younger.