When is it ok to wear a onesie??

Like most people I got a onesie for Christmas .......... ok I got 2 and inherited my husbands one that was too small for him :)

I said I would never be in the onesie club but I caved, sometime around November and bought one and eeekk it is sooo comfy!!  so for me these were the BEST Christmas present.
My favourite one.... my eeyore one - complete with head and tail.