No, you don't need to feel like a weirdo or worry about your health because you aren't getting turned on all the time. Here's why.
As this video from the New York Magazine YouTube channel explains, when it comes to sex drive, we're all wired a little differently. You might get in the mood after seeing something that's sexual in nature (like a sexy billboard), or you might only get in the mood after something arouses you directly (like your partner kissing you).
Both ways are completely healthy and normal.
Part of the problem is the popular concept of "sex drive" itself. The term "drive" implies that not having sex leaves you in an uncomfortable state rooted in survival instincts (like breathing or eating), which isn't accurate. Sex "drive" is actually an incentive motivation system, which makes it less like a hunger and more like a curiosity.
So, just because you aren't constantly feeling sexual desires doesn't mean something is wrong with you. It just means that you're a little different, and that's perfectly normal. Of course,if you're really concerned, never hesitate to speak with a medical professional so they can tell you what's going on.