There are many beautiful Shounen Ai. Of course, in most of them aren't sex scenes, but it's all about the development of the two main characters. Maybe you just had bad luck with yours.
Here are a few of my favourite Shounen Ai:
http://www.mangago.me/read-manga/tsumasaki_ni_kourozu/
http://www.mangago.me/read-manga/endou_kun_no_kansetsu_nikki/
http://www.mangago.me/read-manga/hyakunen_kesshou_mokuroku/
http://www.mangago.me/read-manga/ikumen_after/
http://www.mangago.me/read-manga/hakumokuren_ga_saita_nara/
http://www.mangago.me/read-manga/19_days/
http://www.mangago.me/read-manga/kirakira/
http://www.mangago.me/read-manga/canis/
http://www.mangago.me/read-manga/yamete_kudasai_mabushii_desu/
http://www.mangago.me/read-manga/mayoke_no_darling/
http://www.mangago.me/read-manga/hidamari_ga_kikoeru/
http://www.mangago.me/read-manga/bokurani_matsuwaru_etc/
Yes, SA is actually great to read, its cute and the stories are nice and mangas with male sex are called as Yaoi. In SA sex is either implied or not shown at all. Not every SA is about incest.
You can follow my list:
http://www.mangago.me/home/mangalist/65469/
Um...shonen ai isn't all about incest. XDD And it can be very nice and satisfying to read, even without the sex. Though if you read BL mainly for the sex, then yeah, shonen ai is really not your cup of tea. Seven Days is a really cute shonen ai, they only kiss right at the very end, but it's worth it. A feel-good manga, it puts a smile on your face.
Boy's love has a wide spectrum of genre. it just so happens that what you've read is incest. do check out the tags before reading, i recommend. shounen-ai is really tame and story-centric most of the time. and yes, if you wanted boy's love with sex, it should be at the yaoi section you should be looking over.
if i want to read a manga in school or class or in any public places i prefer reading shonen ai cause it is sweet and doesn't have any awkward stuffs if strangers saw it i'm good in any yaoi or shounen ai as long they don't put tragedy, drama, psychological, history together. had a bad experience with it they made me cry sooo much i can't go to school the next day cause my eyes are swelling and i got asthma attack from crying alot so i'm avoiding it (≧∀≦)
I looooove smut, but i love well developed characters and plot even more
I think we need a genre in the middle!!! ヽ(`Д´)ノ A BL manga that isn't forced to have smut scenes every 1-2 chapters like yaoi, or deprived of sex by heavy censorship like shounen ai.
There's nothing i find sexier or more enjoyable, then when characters that i feel strongly about start to do smex ლ(´ڡ`ლ) .
It's one of the best feels, going hand in hand with extreme fangirling (≧∀≦)
I have a question .... Is Shounen ai nice to read ?? ლ(´ڡ`ლ)
I have once read a Shounen ai but it seem that the manga is more on feeling and incest ╥﹏╥. *sob sob , and no sex Penetration ヽ(`Д´)ノ