Yes first of all strange question but ill answer since you sound decent lol
All my life i couldnt wait to get breasts and when i finally got them i was like omg they are too small i hated them, it is only now, after having my son, that I have grown to like them and enjoy them.
I think if you were to magically obtain a pair for a day then you would find it really confusing as to which bra to buy to support them (unless of course you go bra-less but i wouldnt reccomend that!) theres so many to choose from and if you dont get the correct size itsa nightmare, a bra thats too small squishes them gives you a nasty shape and hurts like hell, a bra too big and your constantly having to pull up the slipping straps! so go get measured then you know what fits!!
2nd expect strange looks (breasts on men that dont look like man boobs - yea people will stare - alot!) they could be tender to touch but only when your period is due (even though you wouldnt get periods of you were a bloke lol)
Make the most of having them though, if they were big enough lick your own nipples thats great to do!
I dont know what else to say its a weird question for me to answer!!