I am basing my observations on my experiments to make cheap disposable razors last forever.
I found that if you clean them off, dry them carefully and replace the blade cover it prolongs their life for two months.
If you put them in rubbing alcohol, you get about the same result.
If you dip them in oil (olive or canola), they will last for six months or longer.
The blade is not damaged much by damp soapy whiskers. The blades are made of some sort of stainless steel alloy, and stainless steel does not hold an edge as long as good carbon steel, as is used in a straight razor.
The name brand razors (Bic, Gillette, Wilkenson, Schick, Personna) outlast the cheapo Chinese ones about double. I think this is because the blades are made of better metal. If you use a coupon you can buy the name brand razors at the bargain brand price.
Razors made for women are no different than those made for men, they are only pink.