sex on tv.... am I the only one?

So I don't get myself sometimes, I'm all for sex (safe sex) and it doesn't bother me if I or other people talk about it publicly, but for some reason when I'm just hanging with my mom or with my boyfriend when a sex scene comes up I get this scared sickening feeling. The feeling is like when you skip a step down the stairs, I just don't get it! I don't know if it's the sexy bodies or what but it just makes me feel kinda gross I guess.... I can barely watch deadpool at the sex scenes let alone game of thrones or this weird Netflix original my mom is watching.... I just hope I'm not the only one! I'm all sex positive but when it's on tv my color drains from my body X'D