I remember my mother saying to me “you'll understand when you get older” whenever I would argue that it made no sens that people were so demolished after a break up, or after being cheated on, or the fact that someone could be jealous about an other person, or to be so unable to control themselves around their crush... but years after this, I never understood!
Funny part is, watching romantic scenes was not uncomfortable to me as a kid, I just could not see the point. It only became awkward when in secondary school I began to see my friends wanting and doing those romantic things and then be sad or mad after a break up, get pissed after being cheated on, etc. Because at this point, before I knew aromantism was a thing, romantic scenes became a friendly reminder of how I could not understand ANYONE around me... And then I would just get pissed and leave the room.