what do you call a homosexual on roller skates ? rolaids   )
What do  you mean by this joke?
Well it's simple. AIDS is causing a lot of death among gays, so they're all on roller skates as if they were big wheels.
You shouldn't think that all gay people have AIDS. You should read the well documented facts that the AIDS virus is something anyone can get. You also shouldn't trivialize something that has been so harmful to  communities and caused many deaths.