"the picture I saw, which as of a model in a short skirt bent over with the shot taken from behind. ....It was a bit...gynaecological."
I saw this too, in my local village newsagents on a trip to the penny sweet section for daughter treats. The eldest (aged 6) pointed to it and said "she is showing her bum", I laughed it off but can't say I was impressed as it was facing up on the lowest shelf in the shop. 4 year old was distracted by cherry lips or cola bottles
In regards the OP, I'm not fussed either way really, can't see the point of magazines and can't see the offence (of these ones in particular) although I can see the confusion - I just figure the latter is more.... graphic.
lad mag - a magazine aimed at or appealing to men, focusing on fashion, gadgets, and often featuring scantily dressed women.
porn mag - writings, pictures designed to stimulate sexual excitement