The local army/navy surplus store sells "tactical" military gear, such as pouches, holsters, vests, etc. This label implies that not all military gear is "tactical", and thus that there are some military operations which do not use tactics. This might be the case.
Or maybe it's a empty phrase to sell junk, kind of like "all natural" or "quality".
Now, if you really want to know the biological reason that humans do not consider the saliva of romantic interests disgusting, check out this theory (You don't want to know).