Might as well share razor blades.
I understand that it feels weird to go out to the store to buy some for yourself, and then having to worry about having them in your possession, in your own home... But you have to get over that... Its like every man's fear to go buy tampons for their girlfriend, as if they feel like the cashier will judge them, as they are buying it for their nose bleed. You have to keep in mind, going to buy something that your type of person [i.e. boy buying panties, girl buying jock strap, young man buying depends, white girl buying pomade] would not normally buy, people will not look up at you and think "Oh, this guy is weird, he is buying panties for himself.", they will usually automatically assume "Oh this guy is nice, he has the guts to go buy his girl friend underwear" or something like that.
I encountered the ultmate awkward experience, when my girlfriend sent me to the grocery store I work at to get tampons, and walking out of the store using self check out, two co-workers saw me. They did not ridiculed, they continued conversing amongst themselves, accept talking now about how much they wish their man would do that for them.
Remember, people are not always as intuitive as you are afraid they will be!