Oh ! It was porn

Thank you, fellow blippers, for putting me right. My "fighting" spiders yesterday were doing something VERY different. And the chances are that the male (the smaller one) would die after mating.

It's worth a glance at the larger version

I'm not specialising in this, I have to assure you, but when I came across these two, I wasn't in any doubt about what was going on.

For those of you who prefer plant beauty