'Sex talk amongst young men', is not the same thing as 'sex talk the way Trump does it'.
Seems to me that when people go through puberty, a new and fundamental element of life begins to enter their lives. As they become aware of sexuality, it stands to reason that they are interested in it; even fascinated by this new thing.
And so - they talk about it. Adolescent boys in groups talk about it. I expect that adolescent girls do as well.
But for various reasons, some adolescents and young men come to revel in talking about it in a smarmy, gross way. Some of them. Some of them continue on like that, or even get worse as time goes by.
They turn into piggish men, when it comes to talking about, and dealing with women.
As time passes, and the sexual aspect of life becomes less of a novelty, it's arguable that a percentage of men lose interest in the immature bragging and obsession that may have occurred when they were adolescent.
But not all of them. Some percentage of men develop a piggish outlook about sex and women when they are young; and they continue to be pigs, as they go through life.
Donald Trump is one of those pigs.