Changes

Non-penetrative sexual contacts and mutual masturbation are usually referred to as ''outercourse'' (oral sex may or not be penetrative),  

Non-penetrative sexual contacts and mutual masturbation are usually referred to as ''outercourse'' (oral sex may or not be penetrative),  

<center>For lessons on the [[topic]] of '''''Sex''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Sex '''''this link'''''].</center>

<center>For lessons on the related [[topic]] of '''''Sexuality''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Sex '''''this link'''''].</center>

Sexual intercourse for most animals other than humans occurs at the point of estrus (the most fertile period of time in the female's reproductive cycle),"Females of almost all species except man will mate only during their fertile period, which is known as [[estrus]], or heat..."  However, in most instances, humans have sex primarily for pleasure. This behavior in the above mentioned animals is also presumed to be for pleasure, which in turn strengthens social bonds.

Sexual intercourse for most animals other than humans occurs at the point of estrus (the most fertile period of time in the female's reproductive cycle),"Females of almost all species except man will mate only during their fertile period, which is known as [[estrus]], or heat..."  However, in most instances, humans have sex primarily for pleasure. This behavior in the above mentioned animals is also presumed to be for pleasure, which in turn strengthens social bonds.

== In animals ==

== In animals ==