The formality of Elizabeth vs Anne walking with Charles and Mary to visit the Musgrove party.

The poem is rich with assonance, consonance, and alliteration which creates a uniformity and. The speaker’s enthusiasm and joy come through in the poem’s play of sound.

Source: Lit Chart

The unusually frequent use of slant rhyme (4 in total) in a relatively short poem might be a sign of purposeful errors that John Donne makes to implicitly express the excitement and satisfaction that the speaker is experiencing that he doesn't bother about strictly keeping the formality.

Andrew Althouse on Twitter: “@brnichols8744 @JeremySussman @FinancialGonzo @venkmurthy Many scientists use Twitter to carry on conversations (with varying degrees of formality) about published papers, the good, bad, and ugly. The people in this conversation all do this frequently. None of us are anti-science (cont...)” / Twitter. (n.d.). Twitter. Retrieved August 18, 2020, from https://twitter.com/ADAlthousePhD/status/1295168734219337738