Lubricants can be used in a variety of ways. The first thing that I look at when assessing the practical value of a given lubricant is its list of ingredients. If it contains glycerin, then you can be quite sure that the product will not be going anywhere near my vulva or my sex toys. That doesn’t mean that I dismiss it completely, however. It will still be useful for hand jobs, foot jobs, or even armpit or tit wanks if I’m in an exotic mood.