You live in the UK, don't you? Have you ever seen what the most common cucumbers are like in North America? Compared with what we call "English cucumbers", they are thicker skinned, have much larger seeds, and are shorter.
I do, yes, and I hadn't, no, until I Googled them just now and can see what you mean. They look a bit like what we call baby cucumbers. I've bought those occasionally, but didn't think to take note of the size of the seeds.
As a child I didn't enjoy the taste of cucumbers, but later, as a teenager, I was having a meal with a friend and her family, who served salad which included cucumber and I didn't like to make a fuss. Now I love it.
Gillian