Without sexual lubrication there will too much friction causing brusing, or pain on the vagina or penis. Lube keeps too much friction from happening.
Since lug nuts are used to hold the wheels on your car or truck you really don't want to lube or grease them at all. If the lug posts and nuts are rusted, however, you can use a rust removal compound...
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Not on a condom. Only use lube made4 for condoms or they can burst.
yes my friends have.