Can a uncircumsized man cause a woman to smell different or cause bv?

Not exactly: Having sex without condoms can increase the risk of sexually transmitted disease whether he is circumcised or not. Stds can cause odor. Bv is not an std but it is the most common vaginal infection and it does cause odor. Some studies show it is more common in women with uncircumcised partners but important to note it is very common in general.