Home > Sex > Safe Sex > Glossary 09 February 2004 Erection The process through which the penis becomes rigid enough for penetrative intercourse. 0 Check Are you a sex addict? » Ask Sex expert » Join Health24 on Facebook » Quiz Are you ready for sex? » The process through which the penis becomes rigid enough for penetrative intercourse. NEXT ON HEALTH24X Have a question? Ask our sex expert here. 2018-08-01 07:54 More: Safe SexGlossary advertisement Read Health24’s Comments Policy Comment on this story 0 comments Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Live healthier Lifestyle » E-cigarettes: Here are five things to know E-cigarettes have become hugely popular in the past decade, but a rash of vaping-linked deaths and illnesses in the US is feeding caution about a product that's already banned in some places. Allergy » Ditch the itch: Researchers find new drug to fight hives A new drug works by targeting an immune system antibody called immunoglobulin E, which is responsible for the allergic reaction that causes hives.