Dude, since I started practicing kegel exercises, I tend to do that every time I thrust in a girl. Does this happen to you as well?
It’s all about controlling yourself, however, girls might like them. I’m sure you like it when the chick squeezes your dong with her vagina walls.
In fact, during sex you should be doing the opposite of the strong kegel hold: you should try to keep those muscles relaxed. That’s why it’s important to balance your exercise routine with reverse kegels and relaxation in general.
Makes a lot more sense than @Radious