「見た目は悪くないがちょっと軽薄そう」な外見とは裏腹に、彼女はいないし、女性に手が早いワケでもない。

tbd

In contrast to his "not bad looks but seems a bit of a dandy" appearance, he didn't have a girlfriend and he wasn't particularly fast with the ladies.

彼は手が早い。

tbd

He's quick in forming relationships with women.

He's quick with girls.

トムは口より手が早いです。

tbd

Tom is quick to turn violent.