Nope. A man and woman giving pleasure is normal. Same sex isn't. Homo sapiens are heterosexual by nature.

Actually, you're just uneducated. You
do realize that your claim "Homo sapiens are heterosexual by nature" is actually impossible, right? If what you are saying were true, it would be
impossible for homosexuality to exist. Even if we were to regard homosexuality as nothing more than a choice, the fact would still remain that the
ability to receive sexual pleasure from activity with a member of the same gender proves that the individuals so engaged are,
at the very least, inherently
bisexual.
I can prove that by simply observing male and female anatomy.
Observing human anatomy I can see that all humans have a head, which encases a brain capable of higher thinking and reasoning skills. The fact that the anatomy exists for something to be possible, does not mean that employing that possibility is the "natural" state of the species. Your stupidity is the perfect example.
The vagina and penis are anatomically aligned to fit together. The asshole isn't. It has one function, expel waste. .

You must be a virgin. I got a pro tip for you: Not all penises and vaginas fit together. There are many rectums that fit with a penis much better than the associated vagina.
In any event, maybe you should spend a little more time enjoying your own sex life, and less time jealously obsessing at how other people enjoy their own.