The act of using ones voice to produce musical sounds, often with the use of words.
Men in particular who can sing well, or even moderately well, gain an immense advantage over their peers as the ability to sing is by far the single most sexually attractive quality to a woman. In fact it is not uncommon for a male singer to have hundreds beautiful females vying for his affections within seconds of breaking into song.
Also, if accompanied by any form of rhythmic movement or dancing
this effect can be multiplied tenfold.