He normally puts it on. I have a thing with textures and depending on the lube on the condom it makes me a little squicky to feel it on my fingers. I put the condoms on sometimes, but he does it mostly.
When we used condoms for all sex, he put them on almost 95% of the time. Now, we only use condoms for anal and he always puts the condom on. I have to say he has a great technique that there is hardly an interruption.