I have to agree about not believing Patsy.
First, let me point out that JB already had a set of identical underwear in her own size, so it's not that she wanted that design...and why would she want underwear that were so large they would barely stay up and bag down to her knees?
Second, those underwear were supposedly meant for Jenny, and JB already had her own set in the same design. I don't believe JonBenet would have wanted those underwear when keeping them would be depriving her cousin of a Christmas gift, and she already had some that looked exactly the same. JonBenet was known to be a generous child - she may have been spoiled, but she was not selfish. She enjoyed sharing.
Let me ask you this, Ames...if Patsy had those underwear ready for Jenny, and JonBenet wanted them bad enough to ask for them and convince her mother to let her keep them, wouldn't she have started wearing them right away as soon as she was allowed to keep them? Would Patsy have made her wait til Christmas Day to wear those underwear, or would she give them to JB right away? I'm guessing right away - if she's caving and not sending the underwear after getting puppy dog eyes from JB, she's not going to make JB wait to open them, and in her interview, she said she didn't - they were "fair game" as soon as they decided to keep them.
In that regard, isn't it rather odd that the very first night JonBenet ever wore a pair of the underwear she supposedly begged to be able to keep was the same night she ended up dead?
I don't believe she wanted those underwear, I don't believe they were ever in any of her drawers, and I don't believe that she was ever dressed in them while conscious and alive, either. IMO.