When I brought up the subject of toys for me (I specifically wanted anal toys to begin with because Hubs wasn't into anal, but we chose a selection inc a rabbit, beads, plugs etc), Hubs was not interested in getting anything for himself as he was more than happy to watch/assist me.
We talked some more about it and the response was generally along the lines of 'I wouldn't know what to try' so I decided to make up a gift bag of a few different strokers and some different lubes to try. Amoungst the items in there was some tingle lube, regular lube, a Tenga Egg, a stroker and Deep Throat Cup. I left the bag for him in the bedroom and after he discovered it and had had a good look at everything in private, he called my upstairs to try out the one he'd chosen first.
He doesn't look on LH that much, so I generally keep an eye out for him and let him know if I see something I think he'd like and then we look together. I saw the Succu Dry Fleshlight and knowing he had been enjoying some vampire books, I suggested it (also because it was cheaper than the main Fleshlight) and he bought it, along with some cock rings.
Generally he needs prompting to look at an item, but it really up for it when it arrives. I think at first he was embarrassed about owning toys, but now he loves them.
Whilst I do love giving him head or a hand job, the toys seem to do things I can't manage (grooves, bumps etc) and we use them as an 'As Well As' rather than a replacement for physical contact.
Above all, we think they're great fun and I'm just pleased to know he's enjoying himself. I love sharing the experience of trying out a new toy, though equally I am more than happy for him to have some 'alone time' even when I am here, I think it's good for him to explore solo.
The main thing I would advise is to share the experience of choosing toys if possible or make up a goody bag with a selection of toys and lube to try as not all toys are for everyone.