"Not Too Personal a Gift" joke

A young man wanted to purchase a birthday gift for his new sweetheart and since they had not been dating for very long, he decided a pair of gloves would strike the right note -romantic, but not too personal.
Accompanied by his sweetheart's younger sister, he bought a pair of white gloves and the younger sister purchased a pair of panties for herself. While wrapping the items, the clerk mixed them up and the sister got the gloves and the sweetheart got the panties. Without bothering to check the contents, he sealed the package and sent it to his sweetheart along with the following note:
Dearest,
I chose these because I have noticed you are not in the habit of wearing any when we go out in the evening. If it weren't for your sister, I would have chosen the long ones with the buttons, but she wears shorts ones that are far easier to remove.
These are a delicate shade, but the lady I purchased them from showed me the pair she has been wearing for the past few weeks and they are hardly soiled. I had her try yours on for me and she looked really smart.
I wish I could be there to put them on you for the first time, as no doubt other hands will come in contact with them before I have a chance to see you again.
When you take them off, remember to blow in them before putting them away as they will naturally be a little damp from wearing.
Just think how many times I will kiss them during the coming year. I am hoping you will wear them for me on Friday night.
All my love,
Jonathan
PS: I understand that the latest style is to wear them folded down with a little fur showing.