Getting hard while jelqing stretching

Hi guys. I’m 20 years old and my problem is that I’m always getting hard when I try and jelq or do the manual stretches.

I really want to get a bigger dick, but I’m worried that this is going to impact it.. Advice?

Hi

I tend to have same problem. I found that I have to stop for 2-3 min and think of something else, and then continue with jelqing. Watch TV if you can while you do it. It keeps your mind somewhere else, and makes it harder to get hard on, or if you don’t have TV near you at least don’t think of sex.
I hope this helps.