Your sperm count remains commendable but, unfortunately, you have some things to look at. Despite the fact a 70% mobility rate is an acceptable level, if you experience problems with your penis, you will need to do something about it on time. Some of the notions on erection difficulties can be associated with stress, lifestyle elements, or the existing health condition. Implementing healthy lifestyle behavior, acquiring less stress, and performing regular physical exercise will contribute to the improvement of the efficiency of the penis. It is advisable to go for a consultation if the problems persist.