Now let me explain, in Astrology the signs are connected in certain ways to the body. The body part that an Aries rules is the head. One can see in the Aries character the Aries wants to get ahead, wants to be in front, wants to be the first. So the head in many ways, which leads the body, is symbolic of the Aries.
Specifically in terms of sexuality, love making, erogenous zones the Aries can be very turned on by strokes around the face, nibbles around the ear, loves head rubs, scalp rubs and they don't have to be medicinal, they don't have to be more erogenous. It is the head and the nerve endings in the scalp, forehead, cheeks, and around the ears that are particularly sensitive and can bring on erotic feelings for an Aries.
In love making, an Aries lips are particularly sensitive so you can rub your fingertips very lightly over the lip area and light kisses and nibbles around the lips are particularly sensitive. Even more than sensitive, they send an erotic message. It is a place in the Aries anatomy which can be particularly sexual.