After switching bodies in a failed attempt to live out his sexual desires, a self-obsessed inventor must race to reverse the switch or face the rest of his life living someone else?s.

Amen brother!

Timmyelliot may be right. You may be telling the wrong character’s story. If this is just the beginning of an idea maybe try telling the victim’s story and make the scientist the antagonist. It could be a super creepy story but in a good way.
If you want to stay with the scientist you need a better reason for him to want to switch back. If he WANTED this is the first place why does it matter if he never switches back? He would still have his superior mind and now in a superior body. Or is it? I don’t know your details but maybe there is something wrong with the body that isn’t overtly noticeable.. congenital defect? cancer? and now the old owner doesn’t want to give up the scientist’s body..
I do really like the creepy factor though.