To avoid going "The word is whatever *I* want it to be", I'm going to simply go with the Dictionary
here.
sexual intercourse
noun
1.
genital contact, especially the insertion of the penis into the vagina followed by orgasm; coitus; copulation.
Basically it looks all that's required is genital contact.
Now, if that means both genitals connecting with one another, or simply one person interacting with the genitals of another's such as Oral seems iffy.
But judging as it puts emphasis on insertion, it's safe to assume they mean both genitals being in contact.
So technically speaking in regards to this, penetration isn't required but contact is.
But it most likely has to be mutual contact.
However, then we got
this.
Full Definition of SEXUAL INTERCOURSE
1
: heterosexual intercourse involving penetration of the vagina by the penis
: coitus
2
: intercourse (as anal or oral intercourse) that does not involve penetration of the vagina by the penis
So in this case, penetration is *a* requirement for heterosexuals, but it's not the only way to meet it.
Since anal intercourse or Oral intercourse also seems to be allowed.
So in this sense it's outright stated you do not require penetration, but only in regards to the Vagina.
But that seems to only clarify it as a work around to #1, so it's also safe to assume that they do intend some form of penetration with Oral and Anal.
At the moment, there seems to be some conflict... I don't like leaving it here with such a conflict.
*Digs for more dictionaries*
One
noun
- the act carried out for procreation or for pleasure in which, typically, the insertion of the male's erect penis into the female's vagina is followed by rhythmic thrusting usually culminating in orgasm; copulation; coitus related adjective venereal
Two
sexual intercourse
n.
1. Sexual union between a male and a female involving insertion of the penis into the vagina.
2. Sexual activity that includes insertion of the penis into the anus or mouth.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sexual intercourse
n
1. (Zoology) the act carried out for procreation or for pleasure in which, typically, the insertion of the male's erect penisinto the female's vagina is followed by rhythmic thrusting usually culminating in orgasm; copulation; coitus.
Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003
sex′ual in′tercourse
n.
genital contact or coupling between individuals, esp. one involving penetration of the penis into the vagina.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
sex·u·al intercourse
(sĕk′sho͞o-əl)
The process by which sperm from the male is deposited in the female during sexual reproduction.
Three
sexual intercourse
n.
1. Coitus between humans.
2. Sexual union between humans involving genital contact other than vaginal penetration by the penis.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by
Houghton Mifflin Company. All rights reserved.
sexual intercourse.
See
coitus.
Mosby's Medical Dictionary, 8th edition. © 2009, Elsevier.
The act in which the external male reproductive organ—penis—enters the external/accessible female reproductive tract—vagina
Ok, so the majority seems to agree that it's either Anal and/or Oral Insertion, and/or Vagina+Penis Penetration.
Only the very first and very last entry of everything I'm quoted seems to wander out from that wording and describe it as "Genital Contact".
So if one wants to go by majority wins, then yes Penetration is required.
If one wants to address everything though, one needs to clarify what exactly "Genital Contact" defines (and I did look this up too, dictionaries didn't go that deep).
Is it as simple as say "Making the penis's kiss" and "Got a Hand job"?
Or is it another way of saying insertion (Penis on Vagina, Blow Job, Anal etc.)?
Judging by how it's the dictionary though, and how they would take the exact wording seriously?
I'm going to personally assume they mean any kind of contact where stuff like a Handjob would count, otherwise they'd just be saying Insertion.