Foreplay
Part of speech: noun
Definition: In human sexual behavior, the acts at the beginning of a sexual encounter that serve to build up sexual arousal, sometimes in preparation for sexual intercourse or another act meant to bring about orgasm.
Stimulation
Part of speech: noun
Definition: A pushing or goading toward action.An activity causing excitement or pleasure.Any action or condition that creates a response; sensory input.
Example sentence: Our success was mainly due to the fact that we stimulated the nerves of animals that easily stood on their own feet and were not subjected to any painful stimulus either during or immediately before stimulation of their nerves.