Streisand was married to Elliot Gould at the time.
Gould and Streisand divorced in 1971, after eight years of marriage (viaPeople).
May-December romances aren’t the exception, but the norm.

It is, of course, bad manners to kiss and tell.
“Dating Barbra Streisand is like wearing Hot Lava,” Agassi recounted.
Eventually the two would part ways.

Agassi married fellow tennis player Steffi Graf, and, of course, Streisand marriedJames Brolin(viaPeople).