Random Erection Lasts Long but stop once I touch

So I will get random erections that if I’m just relaxing can last 10 minutes whether I think about them or not doesn’t change things. However, if I go to try to masturbate with it and become aroused, I start to lose it. I feel like the second there is physical stimulation I lose the erection. Any ideas?

Maybe there is some phycological barriers that you still need to keep working through; The soft penis play might help if you stick at that. At least your getting hard that’s a positive sign.