I know it's a tech magazine. I'm just somewhat flummoxed what the attractive busty woman on the front of every magazine has to do with iPhones or whatever.
The theory is that seeing them close together, will cause an association in the (assumed male) reader's mind, between the qualities of the attractive sexy model and the product, so that when the reader sees the product in the future, he will be attracted to it on a subconscious level, and thus more likely to buy it ... or in other words, "sex sells".