Man, some of them are okay, some of them are twats... I usually will have a chat with them, and depending on if I have change or take a splash of afrershave or anything may drop 'em something... If they're acting like dicks who aren't personable then I don't bother, otherwise whatever; like people said before - they're just tryna make ends meet.
Also, there are a variation of songs and phrases including:
"No splash, no gash!"
"No money, no honey!"
"Fresh-ennnn up... For the punani!"
"No Spray, no lay!"
Don't listen to them! Only use aftershave if you feel you need it - smell good rather than smell bad whatever...
Or, jus carry this: