Fantastic orgasm in exchange for a love song

There are many ways a man can surprise his beloved girl. Some guys write poems, others buy flowers and candies and this dude sings a song. Sure, it is a simple song about how much he loves his girlfriend and how beautiful she is. Cutie does not expect to get such a present but she loves it very much. So, she decides to thank him with something really special. She starts with a passionate kiss and goes lower and lower until she reaches his dick.