Although it is tempting (and cheaper) to use your partner’s products, you must bear in mind that they have been developed with one gender in mind. Men have thicker skin and larger pores, which generally means that their skin is oilier than women’s. Women tend to have finer pores and drier, thinner skin.
A bathroom war often rages when it comes to sharing razors. It is not a good idea to use your partner’s razor and visa versa. Think about it, women shave a much larger surface area than men, which means that their razors will become blunt quicker. If your wife or girlfriend uses your razor, it will dull the blade considerably, increasing your chances for nicks and cuts.