Sorry to say, but it's hard to tell what semen's gonna taste like... depending on yer boyfriend's diet, it could taste anywhere from bitter to sweet... even factors like smoking and drugs (medical and recreational) can affect the "flavor" of yer man...
There's also the issue of thickness... if he drinks alot of water and fruit drinks, it'll be runnier than if he drinks say alotta milk or anything with alotta dairy which will make it thicker...
If this is somethin yer really interested in trying, I'd suggest goin slow... don't go into expecting to gargle down a load like a pro, work yer way upto it... next time you have sex, put a little cum on yer fingers and try tasting a little of it with yer tongue...
If you can get pass that, try putting some on yer tongue and wooshing it around yer mouth...
If ya can handle the texture and the taste, then yer ready to try swallowing... you can either let him cum into yer mouth like they do in porn with shooting it in...
Or let him cum in yer mouth and take it in from there... if you do this method, don't be surprised you you gag a bit the first time... it's not so much the flavor as it can be the force of the cum hitting yer gag reflex...
Also, don't be concerned if you can't swallow it all... some guys blow a bigger load than some, so just try swallowing what ya can and if at any time ya think ya don't wanna try it again, then don't... sex is meant to be enjoyed after all...
Hope that helped and happy fucking...
