butterfly, It is just the way it is. Every woman is different. It might also change throughout your life.
There are many different personal lubricants. Water based lubricants can be reactivated with a few drops of water when it starts to dry and is very good all purpose lubricants.
Oil based lubricants are the cheapest but it does not work well with latex condoms and get sticky.
Silicone based lubricants are more expensive but very good. Keep it away from your silicone sex toys as it makes silicone sticky and soft.
Stay away from the warming or cooling lubricants, the 'his' and 'hers' that combines to give you an 'orgasmic explosion'. Also stay away from flavored lubes.
Many manufacturers make lubes in each category so read the label.
Then there is also PreSeed, the sperm friendly lube that are recommended when you are trying to conceive. It is less 'chemical' and more natural.
Best of luck!