I can see both sides.
It's a spectrum; men are all different and also men can have different moods at different times.
But I do think it can often be true for a large group of men that, when the mood takes them, they will shag anything with a pulse.
But not all men all of the time.
I also agree with the point that younger men, who are themselves in peak physical condition, can be pickier, more judgemental and have higher expectations, largely as a result of men.
Generally, older men do not expect slim, toned, pert boobs, completely shaven, and are happy with a normal woman. (Again, not all men, but in general, I think).
I also think that what these ppl mean when they say "they'll be so happy just to have a naked woman..." is to be taken in the context of that they have a rough idea of what you will look like.
Nobody is going to look like Pamela Anderson clothed and then like Jabba the Hut as soon as they undress.
But yes, I can see both sides.