have relations with

have (sexual) relations (with someone)

To engage in sexual intercourse or activity (with someone); to have or be in a sexual relationship (with someone). As there was no hard evidence that Mr. Smith's ex-wife had sexual relations outside of marriage, the judge was obliged to uphold the prenuptial agreement during the divorce proceedings. I hear Jim got fired for having relations with his secretary.
See also: have, relation

have relations with someone

Euph. to have sexual relations with someone. While engaged to Mary, he was having relations with at least two other women. She was having relations with one of her employees, which was strictly against policy.
See also: have, relation
References in periodicals archive ?
In spite of the negative connotation, many men say that it is not necessary to use a condom with their partners, since "the women are faithful and only have relations with them"; thus, there is a double moral standard in sexual practices of some men.