coitus penis-in-vagina intercourse coitus reservatus http://purl.bioontology.org/ontology/SNOMEDCT/49703004 https://en.wikipedia.org/wiki/Coitus_reservatus https://www.wikidata.org/wiki/Q1429826 Coitus reservatus is a form of sexual intercourse in which the penetrative partner does not attempt to ejaculate within the receptive partner, but instead attempts to remain at the plateau phase of intercourse for as long as possible avoiding the seminal emission. sexual continence karezza The Encyclopedia of Unusual Sex Practices The Complete Dictionary of Sexology Sex-Lexis.com