Many men never think twice about how they masturbate until they start noticing problems during sex. Some can get an erection easily while humping a mattress or pillow but struggle to maintain one during penetration. Others find that they can orgasm during masturbation but have difficulty ejaculating with a partner. Some report that sex simply feels less stimulating than it should. This often leads to a specific question: "Can humping the bed cause erectile dysfunction?" Prone