Tarantulas? On a period-romance novel about England?

I am very confused. Perhaps it’s a metaphor for the crawly sensation in her nether regions? Or perhaps just really, really messed up foreplay.  The Smart Bitches said:

“65-year-old playboy Humbert England was ecstatic when he snagged what he thought was a nubile 22-year-old playmate…except he found out for himself the advanced state of elective surgery when he discovered not just cobwebs in a Certain Place, but spiders, too.”