A philanderer is a guy who likes women. A lot. So much that he's got a beautiful wife — and a date with a different girl every weekend.
The phil in philanderer means "love" and a philanderer's love never seems to stop. "So many ladies, so little time..." — That may just be the motto of the quintessential philanderer, those delightful serial womanizers who specialize in brief affairs of the carnal kind. A philandering husband doesn't just have a wandering eye. He also has wandering hands, and probably a long line of jilted lovers.