Organisms of many species are specialized into male and female varieties, each known as a sex. Sexual reproduction involves the combining and mixing of genetic traits: specialized cells known as gametes combine to form offspring that inherit traits from each parent. The gametes produced by an organism define its sex: males produce small gametes (e.g. spermatozoa, or sperm, in animals) while females produce large gametes (ova, or egg cells). Individual organisms which produce both male and female gametes are termed hermaphroditic. Gametes can be identical in form and function (known as isogamy), but, in many cases, an asymmetry has evolved such that two different types of gametes (heterogametes) exist (known as anisogamy).
Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
by boibot21 September 25, 2020
Get the sex mug.
by BorisTehFemboy May 17, 2023
Get the Sex mug.As I was lying on my bed my boyfriend walked into the room and layer down next to me. After a few minutes he started rubbing the front of his pants against my ass. He slowly slid his arm around me and began massaging my pussy. Almost immediately I turned to face him and he rolled on top of me. “You want me baby?” He asked, “mmm yes please daddy” I moaned, feeling my pussy get wet. He started kissing me on the lips than he began kissing my neck and slowly moving down, never taking his lips off of me. Once he reached my thighs he said “you want me now?” By then I could hardly stop myself from shoving his face into my pussy. Instead, I responded with a series of moans to answer his question “mm mhmm please” I panted. He slowly slid his tongue in and out of my pussy while still massaging my tits. Than he began going faster and he took his hand and began rubbing my clit as he ate me out. “Uhh, mmmh mh yesss” i moaned. To repay the favor I took his dick into my mouth and began sucking, once he couldn’t hold back anymore he shoved me on the bed “you ready?” He asked “YESS” I yelled. He slowly began rubbing his cock against my pussy lips and moaning “mmm baby girl, ughhh, your so tight, I want to feel inside you, mmmm baby” then he thrusted harder and harder while I yelled “DEEPER UGHHHH DADDY, HARDER, HARDER UGHHH” then we both orgasmed and fell asleep with my hand on his dick and his hand on my boobs. Best. Sex. Ever
by Sexloverrrr December 30, 2022
Get the Sex mug.by BiggestPussyAnus January 21, 2018
Get the Sex mug.When two people or more have sexual feelings for each other and start doing nasty things.
Also when a mans penis enters forcefully into a womans pussy. :s
Also when a mans penis enters forcefully into a womans pussy. :s
by VincentAfton(AU) October 5, 2020
Get the Sex mug.Back in the old days Sex is what a women and man did to reproduce. Times have changed ,people hacked the science and do it for pleasure. sex can now be done with the same gender, alone, in groups, with toys, silicone dolls, and in virtual reality. Sex can be bought ,sold, simulated, and scripted to portray modern fantasy's in pornography. Sex is an act, it involves stimulation of the genitals which can result in orgasm. Sex is for adults , it is mature and it requires consent and responsibility.
by fuckhand November 18, 2021
Get the Sex mug.