The one that I go to the most is a transparent Fleshlight. Nice internal texture, gives great sensations. And watching my cock penetrate gives me a good idea of how it would look if I could see inside a pussy. Then I can see the cumload as it shoots out into the Fleshlight.
I have a few. I love masturbating with ladies silky nylon panties, lingerie and women's worn sexy skirts. With respect to skirts I have done this many times while the lady is actually wearing the skirt. It really gets me off massively.
Thongs and lingerie, I’ll usually wear a nice VS g string and put a handful of thongs around shaft and balls, I love the feeling. As well as wearing a sexy lingerie slip and I’ll put more thongs underneath it, I love the feeling of thongs against my skin.