Many parents feel uncomfortable discussing sexuality with their children, experts say it starts with a compassionate discussion about gender. To begin discussing intimacy with his young adult son, American biohacker Brian Johnson wrote an instruction manual after his child raised questions on the topic. “We have a whole generation of people who haven’t been educated about how to love and what it really means,” the longtime entrepreneur told Business Insider.

“When you put your hand on your partner and shake it rapidly, the processes of touch in the body are different. If you shake it slower than 3 cm per second, the nerve fibers say, ‘I feel intimate.

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