animal_genitalia anthro balls big_balls big_tail carpet detailed_background duo embrace female female_on_anthro fireplace fluffy_balls genitals hug hugging human_on_anthro humanoid_genitalia humanoid_penis inside interspecies looking_at_viewer male male/female male_on_human on_knees paws penis penis_hug photorealism photorealistic realistic realistic_fur sheath size_difference smile aurugy human mammal sergal detailed hi_res
When the size is not a problem . 
Sergals are very snugglable ^^

I've made two variants for your taste