The erogenous boy went online and got the answers to his homework on a random website.

yes they are

erogenous, erection

yes it is

This doesn't work with all guys, but for some of us, the scalp is an erogenous zone -- a part of the body that triggers a sexual response when touched. We all have erogenous zones. The mouth is one (that's why kissing feels so good!). The anus is another common erogenous zone, and the skin between the anus and the primary sex organs. For many women and some men, the nipples are an erogenous zone.

Chances are, some parts of your boyfriend's head are more sensitive than others. For a lot of people, the back of the neck and the scalp above it are erogenous zones.