Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
The outer arms are there for external stimulation of the perineum, but how they much they do seems to vary depending on the user.
Source: https://mashable.com/uk/roundup/best-sex-toys-for-masturbation-uk