You have definitely not been on the same parts of tumblr where my friends and I hang out! "Feels" are not particularly sexual. Unless you count wanting to make someone a sandwich or pinch their cheeks or be *~*~*~*so happy*~*~*~* for them as a form of sex. My friends and I talk about having feels when we see or read or watch or listen to things that make our hearts fill up with emotion, but the emotion is usually some sort of empathy or sadness or sympathy or wistfulness or identification with the character/person who's going through something tough or being cute with someone they care about. I don't have "feels" about people I want to date or sleep with.