Question

in excitement,the body hair become straight but why does not head hair become straight?​

Answer 1

because the roots of the head hair are deeper than those.. it is also because the body hair get charged easily because they are thinner than the head hair....

Answer 2

The hair present in our body are generally smaller and the roots are less deeper while the hairs present 8n our head have deeper roots and hence it is very impossible to be erected.