When I was 12 I open my foreskin 1st time i feel little tingling sensation that time. I started masturbation from 12 years. At current I am unable to touch my penile glance area while erection due to too much uncomfortable and feel like current when i touch glance area and during bath if I flow water on glance area i feel uncomfortable like ejaculation will happen immediately. I m tried to do Intercourse with my partner multiple time without any stress of performance or any overexcitement but I got ejaculation on just inserting me and my partner are too much worried about that issue. At current due to performance anxiety I m not getting proper erection but I m getting erection while masturbation cause no pressure. Is there any test available to check penile glance hypersensitivity like biothesiometry (where it is perfomed) i want to confirm is it mentally issue or physical issue and want proper treatment please guide me i will take psychological help too if I need.