Somewhere between 94% and 97% of rap songs mention it's an important part of life to get-it-on with as many ladies as possible . . . but apparently the message isn't sinking in.

A new survey asked people who've CHEATED on someone what kind of music they like the most . . . and rap fans are the MOST LOYAL of anyone.  Here are the full results...

41% of cheaters mostly listen to rock.

26% listen to pop.

11% listen to country.

7% listen to classical music.

5% listen to R&B.

3% listen to gospel.

And 2% listen to rap. 

(Daily Mail)