My penis head is really sensitive...it only take me 1 to 2 minutes to ejaculate when masturbating...how to avoid sensitive on the head of the penis?is there any training that i can do...and do the sensitive effect sex like ejaculating just after 2 minute
This is actually very common. There are mental exercises that some people do to help, also different positions can help to take the edge off or allow you to pause for a minute while still 'pleasing' your partner.
Lovehoney offers some products that may help you in this area also, such as this: http://www.lovehoney.co.uk/product.cfm?p=29533
I personally haven't tried this balm yet, however the reviews look promising. Maybe this would be a good place to start? :)
are you circumsized or intact?
If you still have your foreskin, you are bound to be sensitive when stimulated sexually if the head of the penis is always covered by the foreskin.
If your head doesn't get red, no lumps/blisters etc, then I reckon it's the gland issue. Use a lot of water-based lube, rather than just a bit.
Does it hurt, if you use a thicker condom, during sex?
The sensations from sex are quite different to mastubation, not as tight and fast, when you mastubate you do everything right to make you cum, well it's not like that with sex, try using lighter strokes and stopping when you feel like you're getting close and wait till you relax again. During sex you'll find that if you're really excited about it you may not last that long, don't worry about it, I know some men mastubate an hour or so before which helps delay ejaculation during sex (it also makes your cum more palatable if someone is swallowing it)
As someone who was circumsised just 2 months ago, i know exactly how you're feeling being super sensitive, i just find using light strokes helps me last alot longer.