Does anyone have any good tips for... ahem... lasting longer?
Sometimes my little brother gets over sensitive. I've tried kegel exercises but I find they only make that problem worse.
A Cock ring is the simplest and quickest method of maintaining an erection, it "blocks" blood flow so the shaft remains swelled and stiff. There a wide variety - leather snap on and rubber gasket rings are the most common.
Another alternative is a topical desensitization cream. I'm sure there are fancy and expensive ones at sex shops (ie., Sex Control Cream ), but I would try Lanacane (or something similar - like a hemmoroid cream) which will do the same thing. If you are concerned, ask your physician, but these are pretty mild. HOWEVER, check very carefully - most of these are NOT FOR ORAL and internal consumption - make sure you wear a condom!