Alternative form of you don't dip your pen in company ink

One should avoid romantic or sexual relationships in the workplace.

It is better to do something oneself than to rely on others to do it well.

It is not possible to produce something refined, admirable, or valuable from something which is unrefined, unpleasant, or of little or no value.

(idiomatic, sarcastic) Used to indicate that one is glad, or at least unmoved, to see the addressed person leaving.

Alternative form of you can't put an old head on young shoulders

Young people inevitably lack the experience and wisdom which come with age.

(humorous) Said as a mild admonishment to somebody who is always complaining.

Alternative form of that and a dollar will get you a cup of coffee

Alternative form of you can catch more flies with honey than with vinegar