Washing baby clothes/towels before born?

Alyssa
I've heard to not wash all of the baby's clothes before they are born, just in case you need to return some. But, we really don't have that many, they were all gifted to us, and I've already taken all the tags off lol. Should I just go ahead and wash them all? Also, I've never heard anything about washing the towels, burp cloths, wash rags, and receiving blankets. I'm sure I'll use them all so I should just throw them in also right? This is probably a silly FTM question 😋 Thanks!