They had a pierced tongue for 3 years and then they give u a blowjob without any mouth injury if u cum in there mouth if they have HIV can u get it?

Several variables. But low liklihood. Determine the HIV status if possible. If negative then no issue except other stds. If no personal sore, opening, lesion, risk is low. If HIV and you take in fluids, you are at risk.
No HIV risk. Nope. If you are the one receiving oral sex there is zero risk for HIV for you. This is 100% accurate regardless of them having had or having a tongue piercing. There is no risk to receiving oral sex in regards to HIV transmission.