I'm You, Dickhead (2014)

Richard is striking out with the ladies left and right, no matter how hard he tries. Luckily, he lives in a world where time travel is as easy as a trip to the local hospital. So he travels to his past, where he tries to force his 10-year-old self to learn guitar, all in an effort to make himself more irresistible to women. But little does he know that all his efforts will backfire on him, in the most unpredictable way.