Was with a pumped guy recently and was pretty turned off by the results. There was chaffed and broken skin near the base, he had four (yes, four!) rubber cockrings and bands around the base to keep it hard, his sensitivity was minimal and couldn't ejaculate even after he came twice because of all the wraps. Once he took three of them off, he didn't have enough feeling in his cock to recognize that there was still another double-wrapped band around the base.
If you're going to pump, be smart about it, do it for entertainment and don't have any illusions about what you're going to get out of it and the potential costs.
If you're going to pump, be smart about it, do it for entertainment and don't have any illusions about what you're going to get out of it and the potential costs.