How initially 'to get her in the sack' and subsequently to avoid 'her giving you the sack' are not identical dilemmas faced by the male species, but they sure have a bizarre habit of being bedfellows
Wooing, wedding, and repenting is as a Scotch jig, a measure, and a cinque-pace: the first suit is hot and hasty like a Scotch jig--and full as fantastical; the wedding, mannerly modest, as a measure, full of state and ancientry; and then comes repentance and with his bad legs falls into the cinque-pace faster and faster, till he sink into his grave.
There are many fish in the sea, but never let a good one swim away.