Not sure where you live but this is wrong in both in the US and the UK.
Apologies, you're right, I've double checked. It's not illegal to lend the original, but it is illegal to give (even for free) a copy of the original. It is also illegal to lend the original or a copy if the other person makes a copy.
Bluetooth is painfully slow. The last time I remember transferring a song via Bluetooth was about 7 or 8 yrs ago. I wanted to see how fast this "wireless" transfer was. I thought that the idea if not having to use a cable to connect to my PC was cool.
Then I tried it... and learned why you should never transfer music via Bluetooth.