Isn't there a vac tube just for the glans? Thought I saw one online.
Some guys like Stinging nettle (Urtica dioica): Touching stinging nettle can produce itching and welting. This
plant is armed with small hairs that, when touched, can inject a cocktail of histamine, serotonin, acetylcholine, and formic acid. Histamine causes an immune reaction in the body, serotonin and acetylcholine are neural transmitters and formic acid is the same compound involved in bee stings and fire ant bites. Wood nettle (Laportea canadensis) is more common in Illinois and is the only nettle with alternate leaves. (this was from the web) any other poisonous leaf could be used. As a child I was covered from head to toe with poison ivy and my dick got huge. Itched like hell but you might get off on it. You might also enjoy swatting your nut sac with the nettle.
If the reaction is too much to handle keep some BENADRYL or similar handy. It might help your skins receptiveness if you wash groin and glans with an antiseptic/antimicrobial skin cleanser like Hibiclens. I use this before sounding to lesser the possibility of UTI. Hibiclens is recommended for pre-op and available at Walmart in a turquoise plastic bottle by the band-aids. Band-Aid brand also makes and antiseptic that says it relieves pain. Then why would you want that?
Here's one pump that you could search for on Google. Glans Xpands Pro Maximizer. also search on newart for post about it. viewtopic.php?f=8&t=30337
Very expensive but when you have a dream, money is no object. Search for glans pump also. Good growing. keep us posted with your results.