Although I see the Joke about being married to a football team being similar to being married to Christ I do not think the comparison is relavent. The girls who claim to be married to a football team tend to wear skimpy clothes like cheer leaders. The Nuns wear conservative clothes to hide their bodies from men . The Muslims women do the same.
Many other religions do the same.
It is partly a reaction to the bikinis and skimpy clothes that some western girls used to attract men.