no two ways about it

beast with two backs

Two people united in sexual intercourse in the missionary position.

cut both ways

To have both benefits and drawbacks.

eat for two

To be pregnant

fall between two stools

To fit into neither of two categories and, hence, be neglected or fail.

feed two birds with one scone

Synonym of kill two birds with one stone.

for two pins

Readily, with only the slightest encouragement.

go their separate ways

Of two or more people, to cease travelling or spending time together; to depart with different destinations.

greater of two evils

The most harmful or unpleasant of two undesirable alternatives.