At first, sorry for my bad English... I'll try to translate a joke - if you don't understand, or if you see any incorrect translation here, please let me know...

And sorry for the long text - if I had a better English vocabulary, certainly this joke wouldn't be spoiled as it will be - feel free to rewrite it.
(and hope the joke is new to you - at least it is very unknown here in Brazil...
Here it goes (first, assume that this is happening during old 70's - when cabinet (
"boots", maybe?) phone calls was done not with plastic cards, but with metal coins):
A blond girl was in vacations, and after days of traveling, she wanted to talk with her mom.
At the street, she asked a man how she could do it (talk to mom), and the man understood that she wanted to make a phone call, and so he told her to use the cabinets on the office located nearby (I
mean a telephony company office, I don't know the correct English expression here).
She went to the office, and noticed dozens of unused cabinets, and only one officer at work (not too busy, by the way, since there was no one there, besides him and her).
(Translation help needed: The man was not a police officer, just a phone company employee - help me here, my English really sucks!!!)
She asked to the man:
- Hey, mister, how can I talk with my mom?
He answered:
- Make use of any of these cabinets and make a call, of course!!!!
- How much does it cost?
- It depends on where your mom is...
- She lives in Australia...
- Well, so she's on the other side of the world!!!! It will be a little bit expensive...
And when he told her the price, she got shocked, and cried:
- Wow, it's way too expensive to me!! This way, I can't talk to mom!!!!
The officer stared at her (a very hot young blondie, by the way), thought a little, looked around and, seeing that the "way was clear" (no one nearby), he said, murmuring:
- I know a way for you to speak with your mom for free!!!
The girl's eyes popped, and she smiled:
- Really?? What do I need to do to speak with my mom?
- Come back here, just behind this door...
She followed him, and when she saw him standing on the center of the next room, she asked:
- Now what do I need to do?
He said:
- On your knees, in front of me...
She did it, looked at the man's face, and asked:
- Now what???
He pointed to his pant's buttons and said:
- Open it.
She looked at his pant's buttons, with a confused expression, but opened it.
- Now what do I need to do?
- Now take what is inside...
She put her hand inside the officer's pants, and pulled out his... his... You know what...

She stared at that thing on her hand, looked at the man's eyes, and asked:
- What now??????
The man, with a smile on his face, hands on his belt, just said:
- Go on, girl, do it! Do it!!!!
The girl brought the thing near to her mouth, took a breath and said:
- Hello, mom!?!? You wouldn't believe what I'm using to call you!!!!!!