my dad is a pervert and I hate it.

I'm 18 and live with my parents but my dad is the biggest pervert and it bothers me so bad. He always watching videos of very young girls on his laptop all day and night. Everytime we watch a movie he has to comment on all the young girls boobs. Everytime we drive by a young girl he always has to stare and make comments. These girls range from 13/14-26ish. He's 50. The other day my sister was over and she was trying on my pants and he comes in and we tell him not to because she's changing, literally yelled it. He pretended not to hear and looked right at her ass and said you should've told me... one night I was telling mom how I woke up in the night and there was porn on the tv and I had no idea that was even shown on the tv and he overheard and comes to us and says to me "damn you should've woke me up" ....... he makes me so uncomfortable. My boyfriend has told me that my dad was starring at my ass when I was wearing leggings.. I feel constant anxiety and anger around him because his pervertness is so bad.... my mom always sticks up for him and says it's normal for guys to do this like wtf. It's not. My boyfriend has never been a perv.. nobody I have ever met is like that. No guys no boys nobody.. I just feel so uncomfortable.. btw we live in a hotel temporarily (have for the past year) so it's not like I can just stay in my room away from him. But I do stay out for as long as I possibly can to avoid him.