at home fertility test (SLIGHT TMI)

hello everyone! So my fiance and I have been TTC for about 5 months now. I have gotten a bit nervous so I decided to buy him an at-home fertility test from walgreens. my question is not whether or not it works (although if anyone has any advice or experience regarding that, I would appreciate it as well.) My question is, it says on the box that the man is supposed to masturbate into the cup or whatever. he does not like doing that because we usually have sex every day and it makes me uncomfortable when he does it. So he asked if I could do it for him. I told him I would be able to jerk him off but he wants me to suck it. which is fine, but I am just wondering if anyone has any opinions against this idea, or if anyone thinks it will somehow disrupt the process. I'm not sure if this is a stupid question but I thought I'd give it a chance. sorry for the slight TMI and thanks in advance!