Oh, yes I have, but usually only on toys. The only thing is, condoms LOVE to come off inside out, and an inside out condom is an instant no-no. They also tend to be looser. But yes, once again, I don't WANT to do this, but sometimes it happens.
never, ever. not even on toys. thats too much of a risk im not willing to take, specially since i went through the trouble of using the condom in the frist place.