Popularity Points: awarded each time your profile is given a high rating. You also get Popularity Points whenever someone adds you as a friend. 

Karma Points: awarded whenever you give someone a gift. Giving bigger gifts increases your Karma more than giving smaller gifts.

Sexiness Points: awarded each time one of your photos gets a high rating. More quality photos can get your more Sexiness Points. Soon you will also earn Sexiness Points whenever you get it on with someone in Red Light Center. 

Friendliness Points: earned each time you invite someone to become your friend and they accept. Soon you will also earn Friendliness Points simply by spending active time in Red Light Center.