Simplify the following text for a Grade 10 native English-speaking person.
Original: After prodding and sniffing her back , the male is often observed to roll the female onto her side and then assume a similar position himself so that the two animals are abdomen to abdomen , having dug a small crater to lie in .
Simplified: The male is often observed to roll the female onto her side and then assumes a similar position so that the two animals are abdomen to abdomen .