I came across an interesting post on the Naked Wanderings blog. It is overtly about the influences nudism has on our (intimate) relationships, but I found it interesting because it also throws some light on why many people find nudity (and thus nudism/naturism) so scary and taboo. Here’s the cut down version:

[N]udism has a positive influence on both our physical and mental health.
. . .
But how does nudism effect relationships?
. . .
[Apparently] the divorce rate among nudist couples is a lot lower than among textiles . . . are nudist couples sharing different values than textiles which are more likely to keep them together?
. . .
The level of trust in our relationship is high enough that we wouldn’t be threatened knowing that our partner was spending time naked among other nudies.
. . .
[But] in many relationships, trust is often linked with an inevitable idea of not letting the fox into the hen house . . . We want our partner to be sexy as hell when we go out together but we wonder why they have to look so fancy when they will spend a night with friends. We know that a couple of her well placed hip movements in that dress can make a guy go crazy or that with his three day beard in combination with that certain shirt he’ll have girls hanging on his lips. Imagine what it would be like if everyone was naked.
. . .
If we allow our partner to be seen naked and to see others in their purest form, have we conquered jealousy? [Maybe.] It’s all about the intention.
. . .
For us, it seems unimaginable not to see our partner nude at least a couple of times a day, but we would probably be surprised if we knew for how many people it has been weeks, months, sometimes even years since they last saw their partner’s naked body.
. . .
According to [one] poll . . . 40% of the interviewees preferred to only have sex when the lights are out . . . because then you avoid getting caught up in thoughts about your physical appearance . . . If you have any intention to spend at least some part of your life with this person, you still feel that you have to hide your own body?
. . .
[T]here is no hiding, we see each other naked so often that . . . we became aware of our bodies and we accept how we and our partner looks . . . nudity still gets us excited, but it depends on the situation. 
. . .
We get the question about how to convince your partner into nudism . . . Propose that they give it a try. Only once, in a secure and not very crowded place.
. . .
[W]e are completely okay with others who prefer to wear clothes. We are not saying that our lifestyle is the only right one.

If even half of this is true, then I find it a very sad reflection on the state of our minds, and the prudish control which has been exerted on us for generations – this is nothing new. A lot of it can certainly be laid at the door of Western religions and the patriarchy; although there are doubtless other influences too.

Isn’t it time we accepted that we’re basically all the same. We all know what’s under your t-shirt and jeans; my t-shirt and jeans.

So where is the problem? Yes, like so many things the problem really is only in your mind, if you allow it to be.