This is incredibly marketed towards those who want something absurd and dirty. It is the fact it feels dirty and raw, something that is still pure with no human intervention. Not only there is a physical difference in uncut dick but there is also something that feels different. But for gay men, it has become a fetish-something hot at that, to know that someone has not yet been circumcised. Uncut dick is most especially for men themselves, a lot of women do not actually like it because it feels unmanly and gross.
In gay sex, it is not uncommon to spot this very popular search term or fetish.