Literally tore to shreds after taking it off of my dildo so I can imagine it’d be bad to use with a penis as well. I’ve tried a few times, even adding extra water-based lube and it just rips really easily. It's a little better on smaller toys but it still tore, really wish these came in bigger sizes.
Recently I've been on a quest to find good unlubricated or lubricated with water- or aloe-based lube (as opposed to silicone) in my attempts to get away from putting any silicone-based lube with cosmetic additives in my body. One of my partners ripped 2 with his nails trying to get them on, but another partner with shorter nails had no issues. Everyone loved the thinness and increased sensation! Just keep in mind they're quite thin and delicate.
I'm always worried the silicone lubricant on condoms will get on my nice silicone toys! I'm so glad to finally find a decent condom that is compatible with my silicone toys. It's especially handy if you wanna switch from anal to vaginal, just use this condom first, then remove when switching.