I've made a few over the years and some pretty good ones if I may brag. My current fave is a computer-controlled penis pump that I regularly enjoy - not that it's making any long term difference but it is really nice to experience! I'm often found in a hammock in the summer sun, naked and with the pump sucking away on me. I have it set so it allows air leakage until the pump is nearly about to fall off, then it sucks itself on again, quite firm. The regular movement as it sucks back on it awesome! Plus after about 40-50 minutes my cock ends up quite nice, big and fat, perfect for displaying on the nude beach that I visit every chance I get.
What have any of you got that you enjoy?