The few times I’ve gotten to, I got semi-hard but it was likely because I wasn’t dressed for the occasion. When I’m alone and dressed up, I’m always caged (my doing) and I try to get hard but of course I can’t. I wear a nano cage, so there’s no “hard” for me.
I do usually pour pre-cum though, drips out my cage and I love that. Then, when I’ve had all I can stand and need to play with it, I usually get a big dallop of pre-cum, so yummy and good to me. Sometimes I have to lick the cage clean too, sometimes, can’t let it go to waste! I’d love to have a man and suck him while dressed and caged… haven’t yet though.