Boyfriend has an issue...

Okay so basically tonight my boyfriend texted me asking if I had any STDs and I don’t very obviously because i’m a virgin. So, he explains why he would think that (which is), he would jerk off as he goes and then the left side of his peen would ache? or like have a shocking type pain every time it had aftershock or twitching. There isn’t any other sign of like STD like rawness/smell/discharge/blisters ANYTHING. But we just don’t understand what’s going on. I think for now i’m gonna abstain from giving head or anything just in case but does this sound familiar to anybody?