A honeymoon, an Earth ritual, is the traditional trip taken by a newlywed couple to celebrate their marriage, and presumably, consummate it.
The song "Come Fly with Me", a favorite tune of Vic Fontaine's, featured the lyrics "You just say the words, and we’ll beat the birds down to Acapulco Bay; It’s perfect, for a flying honeymoon - they say...". (DS9: "His Way")
The women on the Taresian homeworld infect alien males with a retrovirus that transform them into male Taresians. The newly-transfomed males then marry three of the Taresian women. On their honeymoon, the women then kill the male for his genetic material. (VOY: "Favorite Son")
In 1947, Faith Garland's mother suggested that she and her fiancée Jeff Carlson went to Niagara Falls for their honeymoon. (DS9: "Little Green Men")
Roy Ritterhouse created an artwork entitled "Honeymoon on Andoris" for the science fiction magazine Incredible Tales. (DS9: "Far Beyond the Stars")
In 2369, honeymoon was a word which appeared on a medical analysis, seen by Doctor Julian Bashir who was infected by the aphasia virus. (DS9: "Babel")
In 2374, Worf proposed that he and Jadzia Dax undertake a hiking trip across Vulcan's Forge for their honeymoon, or possibly a mountain climbing expedition on Andoria. Dax rejected the ideas as entailing too much suffering. Jadzia instead consulted the Starfleet Bureau of Information in locating a more-suitable planet. She wound up finding and suggesting Casperia Prime, to which Worf finally conceded. (DS9: "Change of Heart")
Michael Eddington and Rebecca Sullivan were never able to take a honeymoon, as Eddington was captured by Starfleet and later killed by the Jem'Hadar. (DS9: "Blaze of Glory")
Kasidy Yates had also considered considered the mountains of Andoria as a site for a honeymoon with Benjamin Sisko in 2375. (DS9: "Strange Bedfellows")
Before she succame to radiation poisoning, the biomimetic Tom Paris told the duplicate B'Elanna Torres he had already selected a place for their honeymoon: the Graystone Hotel. (VOY: "Course: Oblivion")
After using it to participate in a stellar race, the real Tom Paris and B'Elanna Torres took the Delta Flyer out for their honeymoon. (VOY: "Drive")
In 2379, William T. Riker and Deanna Troi planned on having their honeymoon at the Opal Sea on Betazed. Their honeymoon, however, was delayed when the USS Enterprise-E was diverted to Romulus, while en route to Betazed. (Star Trek Nemesis)