The Scorpionfly Panorpa vulgaris (Mecoptera: Panorpidae) in copula.

Sittard, Netherlands, May 2009

The a slightly enlarged inset highlights the notal organ, dorsally in the middle of the male's abdomen, that clamps the female wing to hold on. Traditionally this is believed to help in coercing mating duration (or 'rape' to begin with), especially when other resources (see below) are scarce and/or the male is starved, but Kock et al. (2009) challenge this functionality (?!)

Two other tactics -providing a nuptial gift and providing salivary masses- are depicted in the image linked below: