If a person’s shoulder were consistently stroked during each pleasurable sexual experience, it would soon become a source of sexual arousal. This part of the body would then be MOST appropriately labeled a:

secondary erogenous zone

Explanation:

Erogenous zones are sensitive areas of the body that are highly innervated which when touched arouses a sexual behavior. There are primary erogenous zones and secondary erogenous zones.

The primary erogenous zones are the genitals while the secondary erogenous zones are any other part of the body we find arousing when touched in the right way.

Also If a person’s shoulder were consistently stroked during each pleasurable sexual experience, it would soon become a secondary source of sexual arousal because they are touched within the context of sexual intimacies.

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