The way to a man’s heart, it turns out, is through his butt.A hot new book is out that offers a whole lot of hindsight, er, insight, into what makes a man happier and better in bed.Want to make your guy more compassionate in the sack, more appreciative, more of a wild thing? According to The Ultimate Guide to Prostate Pleasure: Erotic Exploration for Men and Their Partners, the surefired ticket is anal penetration.Authors Charlie Glickman and Aislinn Emirzian argue that straight “men who get into anal penetration are among the most secure in their masculinity: because they’ve examined themselves, faced their fears.”The sex writer say prostate play — specifically by a woman using a dildo or some other contraption — isn’t just pleasure. “It’s liberation from the masculine straitjacket,” as Hugo Schwyzer writes in Jezebel, “with happy consequences that extend well outside the bedroom.”He goes on:In a deeply misogynistic culture, there are few greater fears with which men are raised than the fear of being labeled as someone who acts like a woman, allowing himself to be penetrated. There’s a reason why insults like “pussy” and “cunt,” when thrown at men, are so much more inflammatory than “dick” or “prick.” Reducing a man to what he already possesses is mildly insulting at best. Calling him a female body part that men penetrate with their penises: fighting words. (Never mind that many women never have heterosexual vaginal or anal intercourse; our cultural myths suggest that all do, or at least should.)Men, the authors maintain, will be less rushed with their foreplay once they’ve experienced how long it takes to become relaxed enough to, shall we say, comfortably absorb the dildo.And for women, the act of pegging a man can be just as eye-opening, suggesting that “many women who use strap-on dildos discover how much work, responsibility, and (sometimes) power can be part of fucking someone.”