Ok I gotta resurrect this to correct this…. STI’s can MOST CERTAINLY be transmitted long after the sperm have died, if it’s not dried out or sterilized.
While a dose of horse semen isn’t a tablespoon, but almost 75% of it is a milk based extender (or other type). So any flavor you’d get would be milk-like. Frozen is even worse, there’s almost no “semen” in it anymore, just extender and sperm. Similar process with dogs.
Most other species don’t use cooled semen, they sell frozen 0.5ml straws. But they’re a lot cheaper! Good bulls run $35-75+ per straw. But, 99% of it is extender, and in no way represents anything at all to the original semen.
So I agree, buying semen commercially will not resemble semen of any type. If you find a zoo who’s willing to sell it, not only would they want a lot of $ for it, but it’d also be difficult to ship. Only way is frozen, and overnight as it will quickly grow bacteria. Not cheap to do that. Only realistic way is having a local breeder friend to get it fresh from