Is 16 too young 2 have ?

im 16 and my brother is 18. he lost his virginity when he was 14 but when i told him i think i was ready to lose my virginity he went crazy on me. Is there a difference between how old is old ennough for a guy to have and how old is old enough for a girl 2 have se becuz i didnt think it was fair 4 my brother to act this way.. i caught him b4 and i neva told on him but he said he wud tell on me if i did. Is 16 too yung 2 have ?