Lube is needed for anal sex because, unlike a vagina, the anus is dry. Lube Vaseline; body lotion; hand cream or lotion; baby oil; cooking oil. It seems as if Vaseline would make a great lube for sex. intercourse can also cause tiny tears in the thin skin of the vagina, penis, or anus. It is well known that petroleum jelly is a hygroscopic substance, meaning that repels Unlike personal or anal lubricants that are sold over the counter, when.