Boosting one's brain power doesn't have to be painful, if this new book is to be believed. According to the book entitled Teach Yourself Training Your Brain by Terry Horne and Simon Wooton, two of the best ways to rev up one's brain is indulging in dark chocolate and engaging in sexual intercourse.

According to the authors, eating dark chocolate helps in increasing oxygen levels in the brain due to its ingredients: magnesium and antioxidants. On the other hand, sexual intercourse helps in increasing the levels of the hormones oxytocin and serotonin, which helps people in thinking creatively.

The authors also have other advice in how to cultivate mental awareness and creative thinking. "Mix with people who make you laugh. Avoid people who whinge, as people who are negative will make you depressed," said Horne, a university lecturer.