It’s two sides of the same coin. Both consuming substances and soliciting your body are choices that affect your own body.
Selling drugs / buying sex are transactions at the expense of someone else’s body.
Selling drugs / buying sex are transactions at the expense of someone else’s body.
So how does porn fit into this picture ? Porn actors are selling their bodies, what's the difference between a person having sex in private for money, and someone doing the same while filmed ?