[minkowski]

The logic of this study is typical of many modern statistical studies:

1. the authors fit a certain model, adjusted for certain covariates, and observe that a certain effect of interest is statistically significant.

2. therefore, if (a) the model is "correct" i.e. sufficiently well approximates the observed data distribution, and (b) the regression coefficient and structural coefficient coincide i.e. the true generative DAG is compatible with the chosen set of covariates, then a causal association from the predictor to the outcome exists with high probability.

3. the authors simply assume (2) and therefore imply that a causal relation likely exists.

[Llamamoe]

I expect sexual interest is just a weak proxy for general health - sexual function(including libido) relies on cardiovascular, endothelial, autonomic function, is impaired by under/over-weight, dysglycemia, sleep disordered breathing, poor anaerobic fitness.

[q1w2]

I agree. Another interesting counter-point study is the study that showed that eunuchs live longer (14 to 19 years longer)

https://www.cnn.com/2012/09/25/health/eunuchs-lifespan/index...