Or grab a few of your favorite home-made riffs, then throw them together. One could be the verse, one could be the prechorus, one could be the chorus, one could be the bridge etc. 
__________________ "Aaah"...a sigh of pleasure escapes my lips as I run my fingers over her body. Her perfect, round curves leave me wondering, "How did I end up with her? Why me?"
But that thought becomes but a whisper, as I bring my fingers to gently caress her neck. Her beautiful, slim neck.
Then, without saying a word, I ease my hands down the length of her body, and slowly remove her G string... |