Hook up as in date for awhile?
Or hookup as in having sex once ?
Not even sure what that term means ….
It can mean any or all of those things.
It’s intentionally ambiguous.
Good on them for not spilling all the beans to us lookie loos.
Hook up as in innocent kissing. Barry in his 1992 autobiography (growing up brady), there was no sex, no dating. Just some making out here and there. And no, there was no making out with his tv mom. Just one single chaste date.