@C3PO no, молокосос, it's not. It's slang for pubic zone, especially when there's no hair. Because of soft fat there, it's soft and plump and has triangle shape.
@henman, хавало прикрой; rude and wrong:
https://dic.academic.ru/dic.nsf/proverbs/13757/Шерстяной
шерстяной вареник. == Женские гениталии
гениталии in russian are genitals/privates. Female genitals are vagina. Meaning varenik is vagina.
Same for pelmen: https://dic.academic.ru/dic.nsf/proverbs/6520