dejanbear wrote:Few male pornstars work very hard

For example this guy.
All male "pornstars" work very hard, except those ones casually employed merely on looks like in certain fetishistic genres such as "midget" porn, "old man" porn, etc.
To be a male performer, you have to possess some natural attributes. You must have a dick that is visible to camera when penetrating an orifice, longevity in erections, control in ejaculation, and so on. However, working on such a challenging regimen, today, they are almost always supported by sildenafil, food supplements, steroids, and other sorts of medical assistance. That's why there are no fluffers at shoots anymore. The scenes, at least the penetration moments that form the bulk and not edited out, are much longer but the use of meds left fluffers useless.
Mid to long term effects of taking meds should be assessed separately and if there were male performers as many as females, it would surely be considered a public health concern.