Got one last week. It's not normal, but my wife said something about wanting to make me cum in my shorts, and I was likes, well get your hand in there and do it. She has given me a HJ a few other times. Once while giving me an erotic massage, and a couple times in the shower. This one was different because of the messing up the underwear thing. Next step will probably be to do it in public and make me sit through dinner or a movie like that.
We don't do the shower HJs anymore because she got soap in the peehole and it burned for a while. Also, she really likes blowing me in the shower.