Recently, research revealed that how much sleep you get (or don't) majorly   affects your bond with your guy. But a lack of shut-eye isn't the only thing   that can sabotage your love life. Here are six more weird factors—all backed   up by scientific studies—that can totally create issues in your relationship.

Your Weight Looking at nearly 200 newlywed couples,   the University of Tennessee found that both men and women are more satisfied   in their relationships when the woman's BMI was lower than the man's. While   the study ruled out other factors like depression and income, which could have   skewed the results, these findings are certainly not a reason to drop pounds.   After all, the happiest relationships are those when both partners love and   accept each other at any size, right?

Your Guy's Parents According to a study at the   University of Michigan's Institute for Social Research, couples have a 20 percent   higher chance of breaking up when a woman is BFF with her guy's parents. So,   if you're not super close with your man's mom... that might actually be a good   thing.

Your Commute Slogging through traffic morning   and night seriously ups your stress levels—which in turn can totally affect   your home life, according to research from Umeå University in Sweden. In fact,   the risk of breaking up increases 40 percent if you have to commute to work   every day.

Your Contraception Taking the Pill helps prevent   pregnancy—and maybe breakups as well. According to one study, women who were   on the Pill when they met their partners are more likely to remain in their   relationships than those who weren't. The reason? Researchers concluded that   those not on the Pill tend to judge potential boyfriends by more superficial   qualities—like how good looking and good in bed they are—causing those relationships   to end quicker.

Your Cell Obviously, texting your mom while your   guy's trying to tell you about his day is beyond rude, but the University of   Essex found that your smartphone can put a damper on your relationship even   when you're not using it. Couples who had heart-to-hearts with their cells nearby   reported that they felt less trust in (and empathy from) their partners.