Avoid vanity practices like affixing hair extensions or doing tattoos.

This hadith is about the Prophet Muhammad's (SAW) disapproval of hair extensions and tattoos. He cursed both the people who affix them, as well as those who have them done. This shows that these practices are not approved by Islam, and should be avoided. The Prophet's curse is a warning to all Muslims to stay away from such practices, which are seen as vanity in Islamic teachings. It also serves to remind us that we should strive for modesty in our appearance, rather than trying to draw attention with flashy or extravagant looks.