What's With This?

I don't really understand this picture. Perhaps there really isn't much to understand, other than it's a picture of a cute (mostly) naked man with a sexy treasure trail, perhaps that's all there is to it.

Then again, I suspect it's intended to appeal to foot and possibly sock fetishists seeing as his foot seems to be the focus of the picture and he's wearing a sock over his cock (hey, it rhymes!).

I'll admit that I don't understand foot or sock fetishes as such as I have a more general, man fetish and if you want to be more specific, a male genital fetish and a gay kiss fetish but I suspect that most other gay men like looking at cocks and pictures of men kissing each other too so my interests perhaps aren't so niche as to deserve being characterised as fetishes.

For me, it seems a shame to put a sock over a cock. Any sock and foot fetishists out there, I'd love to hear from you. I'm very curious to know what it is about socks and feet that make you horny enough to want to cum. Sock fetishes, I think I understand - try wearing a sock over your erect cock and then wanking yourself and it becomes easier to understand - but foot fetishes elude me conceptually.