"The only thing that they did together..was to make love"

[louielouie2000]

Originally Posted by Josh2003

That struck me as rather odd too...

Apparently it's grammatically correct, though according to Carrie721:

Originally Posted by carrie721

it is grammatically correct. since "was" is a linking verb, it joins the subject of the sentence ("thing") with the complement ("to make love."). if the line read "the only thing that they did together was make love," it would be incorrect because "make love" is not a noun or adjective. you cannot describe a noun with a verb. in this case, "to make love" is an infinitive, which functions as a noun in this sentence. stevie has bent or broken other grammar rules in the past, but she is on point in this example