Zephrofel Sex drive and penis size are two factors which have a profound effect on the sexual fulfillment of both you and your partner. The physical effects of falling short in either of these areas is confounded by the lack of confidence which results from being unable to satisfy your partner. Sex becomes a source of anxiety rather than enjoyment. To help men improve their satisfaction in the bedroom and fulfill their partners completely, here are the answers to some frequently asked questions regarding how to improve male libido and penis size.