The connection is strengthened by looking at 'woolly'. The only other occurrence of this word comes in Titus Andronicus, when Tamora, the Queen of the Goths, invites Aaron the Moor to make love to her. No, madam, these are no venereal signs . The comparison of the hair of Africans to wool is as old as Herodotus. It provides a bridge between the passages discussed so far.
Touchstone discuss the relative merits of court and country.
While 'fulsome' and 'woolly' are rare words by any count, 'ram' is not uncommon. There are sixteen occurrences of the lemma in twelve works. Semantically, the three lemmata run into each other, and Shakespeare's association of the word with repulsive sexuality depends on this conflation.