

I know one anecdote doesn’t invalid proper scientific research but … erections and even orgasm is not impossible on MDMA. I (a guy) have definitely had a bunch of sex on MDMA, not always to completion but sometimes.
The paper you linked states this at the end of the introduction, emphasis mine:
The phenomenological features of the psychological state induced by MDMA ** show some similarities** with features of the post-orgasmic state.
…
Here, we ** present the hypothesis ** that the impairment of sexual parameters after MDMA may be mediated by increased prolactin."









We had a bob tailed void named Robert, the most loving and friendly cat I’ve ever met. Literally the only things he cared about were food and being loved on.
issues 
Only lived 5 years, congestive heart failure. Apparently he wasn’t a true bob and the mutation that causes the shortened tail can also cause other health issues.