Romance should take place after marriage. Otherwise unscrupulous men and women can use it to lure the gullible into thinking that something real is afoot, when in fact it’s not.
It is a useful tool to spur married couples into building their families (i.e., into making babies). In addition, romantically satisfied couples usually create well-disposed parents.
Romance is not for impressionable teenagers to dabble with, especially without strict parental supervision, nor is it for older folks who cannot or will not have children to fancy themselves with.
The purpose of marriage is to create a family with children. Likewise, the purpose of romance is to help multiply and strengthen said family.
“Like arrows in the hands of a warrior are children born in one’s youth. Blessed is the man whose quiver is full of them.” Psalm 127:4,5
“May your fountain be blessed, and may you rejoice in the wife of your youth. A loving doe, a graceful deer. May her breasts satisfy you always, may you ever be intoxicated with her love.” Proverbs 5: 18,19
Still, for those who can’t have or don’t want children, God made the marriage covenant available as well whereby they can satiate their sexual desires, even though in their case staying single while exercising abstinence is the better option.
“It is good for a man not to have sexual relations with a woman. But since sexual immorality is so rampant, each man should have sexual relations with his own wife, and each woman with her own husband.” 1 Corinthians 7:1,2