I'm hesitant about anyone other than myself buying my lingerie. I like to pick things out I like, in my size, that are comfortable not only to wear, but that I feel comfortable in mentally.
In that same way, I'm not comfortable buying lingerie for other people. When my friends are getting married and having their bridal shower, I might buy them a gift card for a lingerie store, but I'm not comfortable shopping for them.
A bit to personal for me.