Parsing string with multiple HTTP requests

Could you please clarify what the behaviour is when execute() gets passed a string with two (or even more) HTTP requests directly behind each other (seperated by "\r\n\r\n").
In my example

```
pars.get_headers()["HOST"]
```

returned the Host field of **both** requests seperated with a comma (although the hosts were the same).

Interestingly

```
pars.get_url()
```

returned just the URL of the **second** request.