my granny (great-grandmother) said two things that my mother repeated to us, and then I've repeated...
"No matter how crooked the branch, there's always one to match it" (on finding a mate)
and
"Don't go to bed with anybody you wouldn't want to marry"
of course that was back in the days when if you got pregnant, you were scandalized and got married etc... people haven't changed - other people's attitudes have - what was once a disgrace people don't even bat an eye over any more...