I can't do missionary style sex anymore, or the Queens's throne, or the Mare, or the Swing

I should be able to go to any OT in the world and get these problems solved. I don't want compensation or suggestions to try different positions.
Problems:

1.  Fingers and thumb will not stay flat.
2. Wrist collapses.
3. Elbow collapses.
4. Bicep spasticity pulls everything out of line.

I expect cures for each of these, NOT guidelines. My recreational therapist in the hospital just said sex was ok to participate in, said nothing about problems that might need to be solved.
All these benefits from sex, where are the solutions?

Sex after stroke

 

Sex linked to better brain power in older age

Sex: The Ultimate Full Body Workout

 

Better Memory From This Extremely Pleasurable Activity - Sex

 

WHY SEX IS BETTER FOR YOUR BRAIN THAN SUDOKU 

 

Sex linked to better brain power in older age

 

Good News About Sex- It Doesn't Cause a Stroke

 

Sex Does Not Increase Heart Attack Risk - What about stroke?

 

Frequent orgasms may protect against heart attacks