What if anything, can be done to severely curtail same-sex sexual assault in prisons? Is it possible to curtail consensual same-sex sexual...

These are,
of course, two very different
issues.  We should not equate consensual same-sex activities in
prison with
sexual assaults.  Consensual activities are, at worst, immoral (depending on
your
point of view) whereas assaults are both immoral and illegal.

I would argue
that there is very little that can feasibly be done
to reduce the amount of sexual assault in
prisons.  There are one or two
things that could potentially help, but it is not clear that they
could be
implemented or that they would work if they were implemented.  One thing that could
be
done would be to provide prisoners with the chance to have conjugal visits
on a regular basis. 
This might...

href="https://www.ncjrs.gov/pdffiles1/nij/222843.pdf">https://www.ncjrs.gov/pdffiles1/nij/222843.pdf