u/Same_Warthog_6434

I’m currently dating my boyfriend and we both have small penises and chubby. My penis size is 4 inches and his penis size is 4.5. We are a long distance relationship but we visit quite often.
I have fucked him before, and we’re trying to have him fuck me. However, because we’re both chubby, we find most positions difficult.
I was wondering if there was different jerking off techniques we could try that could “train” us essentially. My problem is that I jerk off too fast and my muscles tense up too much, and we both have this problem of being used to cumming while lying down. He also goes soft when jerking off standing. What are jerking off techniques we can try to help with these problems?