I've been trying to figure out how exactly to use 拆开 and what it means since I saw it in a song: Mine, Mine by 周杰伦.

In the song, the translation i got was disassembling which i would think to be like taking something apart? Though i also get the definition online as to take apart or separating, with examples of opening letters and presents: 

你不等我就把所有的礼物都拆开了？
Would you commonly use this for opening gifts/letters or also in other contexts to mean disassembling something?
Thanks!