Slightly more interresting than rats on XTC having sex, wich is indeed something that needs to be studied thouroughly just as well.
Mescaline, although it's a phenethylamine, activates some of the same receptors as DMT does.
We already knew this about ayahuasca, so this leaves the question whether it's a neural mechanism that's involved here or whether the use of these substances is merely part of a lifestyle that's just very healthy.
I wonder if these substances are just straightforward 'good for you', or whether the religious and ritual context plays a role here as well.