Not really sure how much of an introduction I need here, but I'm Rollo Tomassi author of The Rational Male and The Rational Male, Preventive Medicine.
If you've been at all active on this sub you'll no doubt have seen my name or blog come up in comments. I also have several of my more seminal posts linked on the reading list sidebar here. I'm also considered one of the three 'R's of the manosphere (Roissy, Rollo, Roosh).
I haven't done an AMA in about a year and a half, so fire away with the questions. I will answer pretty much everything, but just know I'm known for having quite an extensive library of previous posts so I may link you to an essay I've written in the past if I think it'll answer your question more adequately.