Marriages were also undertaken for money, as was the case when Mrs. Arabella Hunt proposed to Tom and he was tempted, though he finally declined. Marriages were sometimes undertaken for love and necessity together as when Nightingale and Nancy were married. This brings up the point that marriages very often went against parents' wishes and that parents' wishes were not always honorable ones as in the insistence of Western insisting that Sophia marry young Blifel even though she plainly detested him and he only consented to aggrieve Tom.
Marriages were sometimes not undertaken because they were deemed to be odious. A woman of beauty and independent means, with her pick of paramours, might very well loath the thought of marriage and attempt to do away with suitors as was the case with Lady Bellaston who refused Tom's mock proposal (no sincerity in that one at all) and attempted to have him shanghaied into the navy (which means conscription would have been decidedly against his will and without his choice). Additionally, marriage was unfavorably viewed by virtuous young women who knew that a suitor had too much "experience" with liaisons, as was the case in Sophia's eventual reaction to Toms' "experience" (of which he had waaay too much).
Finally, in the end, in Tom Jones, there were marriages that seemed to be respectful and loving but really had secret undercurrents as in the case of the