It is more intense, most works where is just implied that they're naked or partially naked is just because they don't want to jump there and make it a full sex scene ... like "yeah well that happened so MOVING ON!" like off screens death, I don't want gore, but that doesn't mean I can't stand blood or seeing a character dying.
As for your "look at your own body" that's... really? Should I assume everyone has the same type of body as me? should I film myself naked and use that? how narcissist do you think we are lol it would've worked better saying "lol just get a girlfriend and watch her naked!" and still, partners aren't sexual toys that you can use every time you feel horny, is more complicated so a lot of people would rather watch porn.
Romanticism and erotica is fine to read casually or like an opening but unless you're scared or disgusted about genitalia, there's absolute nothing wrong if you want to see it, that's called sexual desire.