thats cos he uses his titty avatar to promote himself! yes he might have boobs, sorry moobs even! but people see the titty avatar and think oooh, woman, hot woman before they have even read the profile, I know I used to.
it's a case of use and abuse.
use your avatar to promote something you're not and get something for nothing, then when they ask for something in return, abuse your position, take off and not give them what they want!
I see that so often in games all the time, I play gran turismo 5 on ps3 too and we have the powers to sell or trade cars, we have had a number of racers just offer to sell a racer a car, recieve the funds and then take off without sending the car.
see, it happens everywhere.