@stride
It's noticeable (as that last panel acknowledges) but not too bad. 4 in a row is about the limit and that last one was more a punchline to the serious internal monologue. So I give it a half pass. Still pushing it though, and any more would have definitely been too much though.
Also to be fair it seems like a lot of the male dynamic in their particular friend group is dick centric and Maruyama has always been on the receiving end. I think this was his way of getting to do it to the "new guy" but Mamoru spun it back around on him and the resulting spiral of dick related activities had unintended consequences.