The pulse can be palpated over the following arteries

Radial artery is the most common
carotid artery
brachial artery
femoral artery
popliteal artery

Its simple its a because they are more fat

Hiv can be transmitted through oral sex. you can get hiv through vaginal fluid and semen. if you have an open sore or cut in or near your mouth and an you get the semen or vaginal fluid of an infected person in those cuts or sores, you can get hiv