nah, he should get a hard erection while sucking dick. that's better than not being able to be aroused by it. I would love to suck that man's dick but I would want my dick to be hard as a rock while doing it. A cage would prevent that which would ruin the experience. It's better to be turned right the fuck on by it.
Love to have her feed me his big black cock until he gets hard then watch him fuck her and cum in her pussy for me to clean up then suck her pussy juice off his cock until he cums in my throat