I have not pumped, but what i have found out, in general.. is that once u start pumping it becomes addictive and u when u see yourself enlarging in that tube u think wow, it gives you pleasure and a buzz to try and achieve a larger penis. This of course isn't permanent. You may find gains over time but the problem is like u say your penis will look like a bloated chewtoy if u don't do it properly. A pump (used correctly) is meant for an Erectile Dysfunction aid to help men achieve an erection for sexual intercourse. On the other hand men abuse this and get hooked on the feeling of having your penis being sucked into a tube. From what i have found the majority of women/men would rather have a sexual partner that has everything that nature intended and dislike the look and feel of a pumped penis. Over-used You will end up over-stretching the chambers that fill with blood inside your penis and this will result in impotence. How often do u find guys that over-pump keep the tube attached? Its because they cant maintain an erection otherwise and become dependent on it! I'd say forget pumping all together its ugly and not worth the hassle. You still see guys pulling hot chicks even with small dicks.. or whatever the case is?.. its never purely down to having a large cock.