A womanizer is a man who repeatedly gets emotionally and sexually involved with other women while - not necessarily - being in a primary relationship. He indulges in flirtatious behaviors, attracting women with his charm and wooing conduct. Womanizing males are often very charming, appealing, and may even seem vulnerable, which many women find most endearing. Along with the playful seduction come flattering words, gifts, entertainment and fun activities bestowed upon his momentary love interest.
After he dropped you off, he called Ashley for a date. Don't you see it!? He's just a womanizer!