Found two needles stuck in the wallpaper, why would someone do that?

There could be a variety of reasons why someone might have stuck two needles in the wallpaper. One possibility is that the needles were used to hang a decoration or other item on the wall. This could be a picture, a tapestry, or a piece of fabric, for example. Another possibility is that the needles were used to repair a tear in the wallpaper. This could be because the wallpaper was old and starting to come apart, or because something had been hung on the wall and caused it to tear. Finally, it is possible that the needles were stuck in the wallpaper as part of a craft project. For example, the needles could have been used to create a pattern or texture in the wallpaper.

No matter the reason, it is important to be careful when removing the needles from the wallpaper. Depending on how long they have been in the wall, they could be stuck in quite firmly and may cause damage if not removed carefully.