Other than maybe 3 times a year, it's what we do. We've got a DocJohnson, leather harness that designed for both sexes to use, and a collection of dildo's. Much of this works, because she had a pre-existing love of dildos, so since she was using them, more than me, I suggested I wear one, and it worked. She still uses other toys, probably more than we have sex, but that's fine. I am fairly big, but with a strap-on, there's no worry about going soft, or pre-cum making things too slippery, which was an issue. I have a big denial fetish of course, so I enjoy this quite a bit.
We have one dildo with no balls, but we, and especially I, prefer ones with balls. The reason being that I always wear my CB chastity device, and the balls, especially when I get hard, press down on the base of the shaft, and when it's going well, it feels like real sex, but with say, a condom on, and some numbing cream on the head. Not 100% of normal, but pretty good. Ours range from a 7" UR3 that feels real, to an 8-9" model. Honestly, I see these hard between my legs more than my own equipment, so after a while, they feel like the real thing, mentally. Given that any erection is a temporary thing, putting the harness on is like getting an erection to me at this point. Years ago, I gave up the idea of pursuing my own orgasm during sex, and focus totally on giving, so this way of doing things has worked great for years now. The key for us, is a good, solid harness with little free-play, and a range of dildo's to try out. If you can find them on sale, all the better. We have about 5, but 2 are in the regular rotation. Since I don't masturbate anymore, and I'm mostly locked, I love them almost as much as the Mrs.
Living with my 2 favorite people, in a semi-poly situation. Serving my Mistress Crosby, who holds my keys.