NEW YORK — What’s the rush? Designers seem to be asking this as they offer up easy looks for lazing on the beach or dancing all night. “I wanted sexy clothes that can go over swimsuits or be worn out to dinner,” said Ralph Lauren, who showed handcrocheted swimwear, paint-splattered shirts and pants, knitted strapless tops and charming chambray overalls. Oscar de la Renta also put some beautiful handwork into his signature collection in the form of long, embroidered tunics; handpainted columns, and a strapless dress detailed with ribbon and needlepoint. For his secondary line, Oscar by Oscar de la Renta, he beaded tuxedo pants and eyelet shirts and embroidered sari-printed skirts. Sonia Rykiel, meanwhile, went for the striped sailor theme that’s one of her signatures, but she also showed wild polkadot prints on peasant blouses and full pants.