When my boys are older, I do not want them marrying the first girl they fall in love with.
There will be many other girls as they get older that they will be more compatible with....i also would hope that they have safe sex with different people to learn about the differences in women, (if they are gay, that's ok with me too) to learn different techniques, learn about themselves....every new person you meet, brings new things to the table, good and bad...it's learning from these things that make you wiser...
While I think that it's ideal if you can meet your lifemate when you are a virgin, the likelihood of that happening is like winning the lottery...
I just want them to be happy...if they only want one partner for the rest of their life, then I support that...but if they wish to play the field, I'll teach them to be smart about it, safe about it, and teach them to always be honest with their intentions...as long as both parties know where they each stand, it's all good. just my opinion.