A guy went to a clinic for his blood type taken.
The nurse goes about taking the blood sample from his finger.
After finishing, she looks around for a piece of cotton to wipe away the excess of blood.
She can't find it so she looks innocently at the guy and takes his finger and sucks it.
The guy is so pleased he asks;
" Do you think I could have a urine test done?"
blood type = tipo sanguíneo
finger = dedo (da mão)
look around = olhar dos lados
piece of cotton = um pouco de algodão
wipe away = limpar, retirar