It was a short SF story I read approx 40 years ago. Unremembered anthology in the UK.
An alien scout party beam up or abduct a man and a woman, strangers to one another, from some American road. The aliens strip them and inspect and then discuss their physique.
The alien captain asks if the woman is defective because she has small pert bosoms, he has a copy of a magazine translated as 'Recreation Lad' and, in the images of that magazine, bosoms are depicted as large globes.
The captive man assures the captain that the woman is fine, pleased with this the captain then asks them to mate so his science team can study the mating process.
Upon refusing, and following several heated discussions, the aliens release the humans after allowing them to get dressed.
It ends with the pair chatting near their cars and knowing that nobody will ever believe them. I think they then decide to go on a date.