Just how did Bulma and Vegeta get together?
Ah, one of the great mysteries of the universe, this topic has been explored by hundreds of fanfiction writers everywhere. The coming together of Bulma and Vegeta is never actually shown in the Anime or Manga; it is left up to the viewer’s imagination. All that is known is that sometime in the three years before the androids attack, they get together long enough to conceive Trunks. Mirai Trunks tells Goku that Bulma and Yaumcha broke up and out of passion and loneliness Bulma and Vegeta got together.