Is my dad normal?

my dad is 54, im 17 a senior in hs. He always has mood swings, and he gets mad at me for nothing. like today he yelled shut up to me because i was talking to my sister (in a quiet normal indoor voice). another day he told me he would slap me because i didnt know how to help him with the computer. his ego is always... show more my dad is 54, im 17 a senior in hs. He always has mood swings, and he gets mad at me for nothing. like today he yelled shut up to me because i was talking to my sister (in a quiet normal indoor voice). another day he told me he would slap me because i didnt know how to help him with the computer. his ego is always hurt when other men in the family like myself talk in a discussion, and he isnt the only man talking
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