I wood say because Iām Holland smoke an other joint!
After the friend turned their head, I would simply say āOk, Iām doneā. I feel like saying that they donāt like the sight of blood is just them feeling guilt and rationalizing the act of turning their head. Almost like they know what they are doing is wrong or unjust in some way, but they really just donāt like blood. I wouldnāt take offense to it nor would I expect someone to watch me make my finger bleed.
Iād say āIf you canāt stand the sight of blood, then donāt watch when I check my blood sugar, you idyit!ā Seriously.
What I would do? Burst out laughing? 
Whatās the meaning of the word āfriendā if he doesnāt know that I am a diabetic and I donāt know he canāt stand the sight of blood? That person must be joking or he must be a total stranger, incorrectly described as friend.
When I was diagnosed (in 1977) the advise was that Diabetics should never smoke dope. The reason given was that it could cause an uncontrollable attack of the munchies causing you ābreak your diet planā and increase your BG!..
I have heard that weed can have that effect. 
Funny, Iāve āheardā that, too! 
Purely secondhand hearsay, you understand.
Hmmm. Further thoughts. Since it IS now legal here, I wonder what the combination of MJ and cinnamon might accomplish . . . does anyone know of a study exploring the effects of smoking cinnamon?
@David, I donāt think you need a study to tell you smoking cinnamon would make you sick! LOL
David, didnāt you hear that smoking weed, along with eating a tablespoon of cinnamon will cure both Type 1 and Type 2?
A great tasting space cake maybe???
Yes, David, my cousin/brother/sister/neighbor/taxi driver/kidās school teacher/mother-in-law/ā¦GOT RID of their Diabetes doing that, and if you care about your health, you should do it too!
(Sorry, Iāve been told by many people about all of the people they know who ācured their Diabetesā by doing/eating XYZ-fill-in-the-blank!)
My response?
āTurn your fāing head then.ā End of response.
I would say, Iām sorry that it bothers you, you might want to turn away for a second or two. I see no reason to be confrontational, politeness works much better.
I lack tact. Itās a hypothetical situation where someone is obviously attempting to be confrontational in the first placeā¦akin to a woman breastfeeding in public. If you donāt like itā¦turn your head. I donāt sugar coat much in my life.
I guess thatās why we differ in approach, I did not see the hypothetical situation as confrontational. There are people that are squeamish about blood. If their aversion to blood causes a strong reaction I am willing to overlook it
Sharing irrelevant information with a stranger about what you are, or arenāt squeamish about is confrontational imho. 
If I donāt ask someone if theyāre squeamish then I am not really concerned if they are or arenātā¦so them sharing the info isnāt relevant. If youāre squeamishā¦just hold onto that (silently) and look away.
A friend of mine nearly passes out when he has blood drawn for lab tests but isnāt bothered at all by my fingersticks or injections. Go figure! 