Yes. I would love it if for some of the romances involved marrying the LI. Maybe even one of them you have to marry first and then the sex scene can occur.
Much better than having everyone be "have mandatory premarital sex or break up" that every Mass Effect romance has been so far.
Not in BG2. Aeirie and Jaheira will break up with you if you do have sex with them in the romance.
Okay in ToB Aerie ends up changing her mind (and winds up pregnant), but you do eventually get married
It's left up to the imagination what exactly happens in the FtB in KOTOR
You don't have to sleep with Leliana or Alistair in DAO to complete their romances
I believe the same applies to Blackwall and DOrian in DAI. And with Josephine, it's again left to the imagination.
Edit: There is no sex scene with Solas either. But I don't know if that's left to the imagination or not
But yeah being able to complete a romance arc without (necessarily) having sex would be a good thing. Heck options in general are good things.