100's of snails get freaky in my yard

From Wikipedia:
All land snails are hermaphrodites, producing both spermatozoa and ova. Prior to reproduction, most snails will perform a ritual courtship before mating. This may last anywhere between two and twelve hours. Prolific breeders, snails inseminate each other in pairs to internally fertilize their ova. Each brood may consist of up to 100 eggs. Snails have small slits on their necks where fertilization occurs and the eggs develop.

I think the ones below are White-lipped snails (Cepaea hortensis).