Multiple orgasms are more commonly reported in very young men than in older men. In younger men, the refractory period may only last a few minutes, but last more than an hour in older men.An increased infusion of the hormone oxytocin during ejaculation is believed to be chiefly responsible for the refractory period, and the amount by which oxytocin is increased may affect the length of each refractory period. A scientific study to successfully document natural, fully ejaculatory, multiple orgasms in an adult man was conducted at Rutgers University in 1995. During the study, six fully ejaculatory orgasms were experienced in 36 minutes, with no apparent refractory period. Females
Orgasmic factors and variabilities
In women, the most common way to achieve orgasm is by direct sexual stimulation of the clitoris (meaning consistent manual, oral, or other concentrated friction against the external parts of the clitoris). General statistics indicate that 70–80% of women require direct clitoral stimulation to achieve orgasm, although indirect clitoral stimulation (for example, via vaginal penetration) may also be sufficient. The Mayo Clinic stated, "Orgasms vary in intensity, and women vary in the frequency of their orgasms and the amount of stimulation necessary to trigger an orgasm." Clitoral orgasms are easier to achieve because the glans of the clitoris, or clitoris as a whole, has more than 8,000 sensory nerve endings, which is as many (or more in some cases) nerve endings as are present in the human penis or glans penis.
SPS may refer to:

Law and government
Agreement on the Application of Sanitary and Phytosanitary Measures of the WTO
NATO Science for Peace and Security
Single Payment Scheme, an EU agricultural subsidy
The Standard Procurement System, for the US Department of Defense
Somali Postal Service
Staff and Personnel Support Branch, part of the British Army Adjutant Generals Corps

Police and prisons
Scottish Prison Service
Singapore Prison Service, a government agency of the Government of Singapore under the hierarchy of the Ministry of Home Affairs
Station police sergeant or station sergeant, former UK police rank
State Police Services (India)
Surrey Police Service, British Columbia, Canada

Organisations
Sahara Press Service, of the Sahrawi Arab Democratic Republic
Sierra Peaks Section
SPS Commerce
SPS Technologies, Inc., acquired by Precision Castparts Corp.
Sussex Piscatorial Society, a fishing club in the UK
Swiss Society of Proteomics, of Life Sciences Switzerland

Education
Sadiq Public School, a school in Bahawalpur, Punjab, Pakistan
New York University School of Professional Studies
Social and Political Sciences, of the University of Cambridge, UK
Society of Physics Students
Springfield Public Schools (Missouri), school district, US
St. Patricks Higher Secondary School, Asansol, India
St. Pauls School (disambiguation), various schools

Political parties
Socialist Party of Serbia (Socijalistička partija Srbije), a political party in Serbia
Union of Right Forces (Soyuz Pravykh Sil), a former political party in Russia

Religion
Saint Patrick’s Society for the Foreign Missions, Ireland, post-nominal
Society for Pentecostal Studies

Science and technology
Solanapyrone synthase, an enzyme
Spark plasma sintering
Special weather statement, US
Stand-alone power system, an off-the-grid electricity system
Standard positioning service, a Global Positioning System feature
Super Proton Synchrotron, a particle accelerator at CERN

Computing
Shell Processing Support, a file format for seismic data
IBM 1401 Symbolic Programming System and IBM 1620/1710 Symbolic Programming System, assemblers

Medicine and psychology
Sensory processing sensitivity, a personality trait of Highly Sensitive Persons
Stiff person syndrome, a rare neurologic disorder
Syntactic positive shift, a peak in brain activity

Military and space
Service propulsion system in Apollo service module
Solar power satellite, to beam power to Earth
Side protection system or torpedo beltof a warship
SR-1 Vektor (Samozaryadnyj Pistolet Serdjukova – Serdyukov Self-loading pistol)

Transportation
Wichita Falls Municipal Airport (IATA airport code)
Spokane, Portland and Seattle Railway, a defunct railroad in the United States

Other uses
Sony Imaging Pro Support, for  photographers
SPS (Mongolia), a TV channel

See also

All pages with titles beginning with SPS
All pages with titles containing SPS
SPs
SP (disambiguation)